Would you tell?
If you knew your mom was planning on leaving your stepdad (has a storage unit, is apartment shopping, slowly moving small things out of the house he won't notice) would you tell him? It's not an abusive situation or anything dangerous like that and they've been together 10 years. She's leaving because they've been fighting for years about the same issues with no improvements and she's tried bringing up divorce but he just brushes it off, acts "better" for a few weeks to get the conversation off the table, then goes back to the ways that cause arguments. I'm torn because of course I love my mom and my stepdad has been in my life so long he really is family and I just feel bad that she's trying to leave how she is. I'm trying not to take sides but does it make me a "bad person" to stand by and say nothing? (NO RUDE COMMENTS PLEASE)
Achieve your health goals from period to parenting.