My grandma abused my whole family for decades but now my family is pressuring me to visit her in the nursing home

I'm just confused about this. My grandma was mean for her whole life. My mom cried to my sister and I about the abuse she endured because of her. There is so much history including my grandma firing my dad the week before Christmas with no severance or anything after he worked for her for decades, leading him to be NC for her. My mom still took her to doctor appointments, but then turned around and complained for hours to me about how horribly my grandma treated her the whole time. The whole side of the family is rotten basically. The last I really talked to my grandma was after she flaked on my holiday party which was also my (2nd) pregnancy announcement, and she texted me the next day thinking she was texting my mom saying it's no surprise I'm having another baby because I clearly just don't want to go back to work (I left my 6 figure job to be a SAHM).

But now my grandma is in a nursing home and my mom continues to pressure me into visiting my grandma with my son (1.5 years old) 1-1.5 hours away. I'm almost NC with my mom because of separate issues but I haven't blocked her so her messages still come through.

I feel so sad that my grandma is in a nursing home now. She had over $10 million not long ago but after my grandpa died she spent it all, even the grandkids college funds. She could've had in home care or something but now she's in a nursing home chain off the expressway next to a Verizon store. To see her finish her life there makes me feel so horrible that I can barely stand the feeling. But between what she said to me last (and never apologizing) and the whole history of my family, I really do not want to visit.

I'm in my third trimester pregnant and am caring for my toddler full time. My husband and I are barely keeping our heads above water getting our house ready for the new baby- we have no help right now so it's on me to clean and cook everything, and I've been pushing myself so hard that I had a risk of pre-term labor and my doctor told me to do way less and take it easy to avoid any issues.

What am I supposed to do? Is there a way to make decisions like this? I do have a therapist, and she said to make a list of priorities to help me make decisions like this. If my priorities are my son, my husband, and my own health, then no I wouldn't visit. But for some reason I just feel like I'm doing the wrong thing.