Hello nikebear and a warm

Grief makes sense in your situation; the cycle of moving in and out and in and out sounds like repeated losses over and over. When grandchildren are involved, losing those relationships is very painful, too. And, I wonder if you're also grieving the loss of who you hoped she could be -- I'm sure you wanted her to have a stable, healthy life, and instead it sounds unstable and hurtful.
How old are the grandkids? Are you able to stay in touch with them independently of your daughter, or does she manage contact?
I keep second guessing myself, even though my therapist said it’s important to set boundaries.
In what areas does your therapist have you working on boundaries? For example, finances, social media, vehicle use...? Or is it less about a specific area, and more in general in your life? Not sure if you've had a chance to see it yet; we have a thread on
Boundaries and Values that could be good supporting material for what you're doing in therapy.
Keep us posted on how things are going for you... looking forward to learning more of your story
kells76