Fed Up

My husband and I are expecting our 2nd child, a baby boy. I'm currently 25 weeks 1 day into my pregnancy. We have a wonderful daughter who will be 3 in December. We live with my husband's parents and my brother-in-law and his 3 kids. Well for the last 8 months or so, we and my husband's parents have been taking care of my husband's brother's children due to my brother-in-law being in prison and their mother unable to care for them properly. I take care most of the house work, laundry, and help out with cooking. Since my brother-in-law has been back, our routine we had established with the kids has gone out the window. He keeps the kids out too late on school nights, doesn't offer to help with anything, and hasn't been looking for a job. All he is worried about is his new girlfriend ( mind you he hasn't been out a month yet). I will be damned if my husband works as hard as he does for his brother to live off his dime, plus their parents are on a fixed income. My husband and I don't mind buying or taking care of the kids, but it should be his responsibility. If it continues like this, I'm going to tell my husband we leave or his brother does. I'm done.