Boundary issues
Edit: I am the husband. This is my wife mother and her sister: I’m struggling with a family situation and could really use some outside perspective.
My mother-in-law is currently staying with us, and I understand helping and supporting her. The issue is my 38-year-old sister-in-law also expects to stay with us because her mother is here. She has had a few short-term jobs over the years but has never really become financially independent. She doesn’t contribute toward rent, groceries, childcare, or household responsibilities. She mostly stays in the house, eats our food, and expects support from family. Whenever I bring up getting her own place or becoming more independent, she responds by saying “family should take care of each other.”
I’m also fully aware that this dependent behavior didn’t come out of nowhere. My mother-in-law has enabled it for years by constantly financially supporting her adult daughter instead of pushing her toward independence. That’s part of what makes this situation so frustrating for me.
Recently I told my sister-in-law directly that she needs to start planning for her own place. She became very reactive, but at the same time didn’t seem to take me seriously. At one point I got so frustrated that I yelled and told her to leave, and she just laughed it off. We’ve even been letting her use one of our cars for a temp job she recently got. This morning I told her she couldn’t use the car and should Uber instead, but then my mother-in-law immediately told her she would Venmo her the money for the ride right in front of me.
At this point, I feel resentful because it feels like we are indirectly supporting this cycle too. Part of me is even starting to question why we should continue financially supporting my mother-in-law when she is turning around and funneling money and support to her fully capable but irresponsible adult daughter. I don’t want constant conflict in the house, but I also don’t want to financially and emotionally support another adult indefinitely.
How would you handle this situation without completely destroying family relationships?