You are the Center. You were never meant to orbit anyone else.
The Sun Part is a therapy practice for women untangling themselves from other people's orbits — whether that's a marriage or relationship that no longer seems to fit, a self you lost somewhere along the way, or a future (motherhood, a bigger voice, a different life) you're not sure how to trust yourself toward yet.
We work with your nervous system, not just your story. We go into the past enough to understand it, then we build forward. And we don't do years of circling the same ground — we do the real, sometimes messy, or funny but important work of putting you back at the center of your own universe.
You've spent a long time being the moon in somebody else's story — good, easy, accommodating, in orbit around a partner, a role, a version of yourself that stopped fitting a while ago.
This is where that stops.
Welcome to The Sun Part — therapy for women ready to come back to the center of their own lives.
Lyndsey Haseltine
Pre-licensed Mental Health Counselor
The Parts
Everything in you is welcome here — that's the whole philosophy. Not fixed, not edited down. Integrated.
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The Fun Part — reconnecting to what actually lights you up: your voice, your likes, your instincts, the parts of you that got quiet.
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The Done Part — the relationships, roles, and versions of yourself you're ready to release, on your terms.
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The Hard Parts, Sticky Parts, Awkward Parts — the stuff that's uncomfortable to look at. We look anyway, together, without judgment.
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The Sun Part – This is the goal! To get you to a point where you are operating as the center of your life. The focus. Will it be a perfectly curated, never-need-work-again life? Nope. But let’s get you front and center and work outwards from there.
All of it belongs. All of it is part of the same universe; the one you're the center of.
About & Approach
About me
I'm a pre-licensed therapist in Newburyport, Massachusetts, working toward my Licensed Mental Health Counselor (LMHC) license. I'm not going to pretend to be a blank slate. If you say something funny, I'm going to laugh. If something you're carrying is heavy, I'm going to sit in it with you, not perform neutrality at you. I believe therapy works better when it's an actual relationship between two humans. One of us just has more training in nervous system regulation, somatics and attachment.
I came to a lot of this work through my own healing, including through yoga, martial arts, boxing, and dance which taught me something talk therapy alone never did: sometimes the body doesn't need more insight, or more thinking, it needs to move and feel. That's part of why nervous system work is so central to how I practice. I'm trained in polyvagal theory (which is just a fancy word for nervous system work) and somatic therapy (how to connect with feelings in your body, instead of just in your mind), currently in training in IFS (parts work), and finishing a certification as a Jai Institute Parenting Coach — a parent-centered approach that works with you, on the theory (backed by attachment science and nervous system research) that when you understand and regulate yourself, connection with your children follows. I'm also in training in Trauma Release Boxing, and I'm excited to eventually bring that into this work — because sometimes what your nervous system needs isn't more stillness, it's finishing the activation cycle it never got to complete.
This space is LGBTQIA+ affirming. It’s not a specialty of mine, but it's foundational to how I show up for every client who walks through the door and that is a non-negotiable.
My approach
I'm relational, direct, and patient. We'll go into your history far enough to understand the patterns running the show: your nervous system's responses, your attachment style, what got wired in growing up. But we're not setting up camp there. This isn't five years of rumination. We're looking ahead, too: at the life, relationships, and version of yourself you're building toward.
There's no right way to do this work, and there's no version of you I need you to perform for me. If a modality we're trying isn't landing, I encourage clients to tell me. That's not a setback, that's exactly the kind of self-advocacy we're working toward. You get to have opinions about your own healing. You get to push back. You get to say what feels good in your body and what doesn't. All of it is welcome, and none of it will be met with judgment or an agenda of my own for who you should become.
Strong, steady, and endlessly non-judgemental. That's the vibe I try to bring.
Who I Work With
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For the woman who's lost herself in her relationship
You built a life, maybe a marriage, maybe a family, and somewhere in the building, you disappeared a little. You can't quite remember what you like anymore, or who you were before you became everyone's everything. This work is about coming back: understanding the nervous system patterns, attachment history, and generational scripts that shaped how you show up in relationships: with your partner, your kids, your parents, and yourself, so you can rebuild from the center instead of the edges. What do you even like anymore? What brings you pleasure? Let's work on inviting pleasure please re-enter the chat. Let's dig in, here.
For the young woman finding her voice
This work is about strengthening what's already in you: your boundaries, your voice, your ability to make a decision and trust it before life hands you more people to accommodate. There will be a deep dive into previous patterns, how some childhood experiences that may seeping into choices as an adult, sometimes without your even realizing, what brings you pleasure, what lights you up, what paths do you want to follow and why? Maybe you’re wondering about having kids and doing the “should I or shouldn’t I” pro/con list. This is about working with tools to help you make those kinds of choices.
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For the Mom
It is HARD. Can we start there? Motherhood can be so difficult. It can be beautiful, and isolating, and infuriating and devastating and confusing and amazing – usually all at once, over and over again – all day and all night long. Whew. I can offer a place to lay it down for a bit. To help untangle all of that emotion, all of that reality. We can figure out together how to trust yourself as a mother, how to better understand what is happening within your own nervous system, your body, your head. How to create some scaffolding for yourself around your own needs, your own supports, and what you want this whole motherhood thing to look like – for you and your small human(s).
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How we'll work together
Across all of this, expect some serious active listening. Expect to be heard. Expect to be gently challenged when appropriate. There will be some somatic and nervous-system-informed work. You’ll be learning to recognize your body's responses to people, situations, and old patterns before they run the show, and some acknowledgement for how they already have been. Some sessions will be quiet: breath, grounding, tracking sensation. Others will need more than stillness — when your system needs to move and complete a stress response, I have tools for that, too. Wherever we start, the goal is the same: you, strong and back at the center of your own life.
As a pre-licensed clinician, with supervision by Ashley Mahoney, M.Ed, LMHC, PMH-C, I can work with clients in Massachusetts mostly virtually, but face to face sessions or "walk and talks" are a possible option when preferred.
M.Ed Counseling - Treatment approach and training/ modalities/certifications:
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Somatic therapy
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Polyvagal-informed nervous system work
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IFS (Internal Family Systems) / parts work (in progress)
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PMH-C (in progress)
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Jai Institude of Parenting (in progress)
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Attachment-focused
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Relational
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Trauma-release boxing (in progress)
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200 hour yoga teacher training
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Black belt in krav maga self-defense martial arts
