Playing evil stepmother here, but bare with me...
As lovely as my stepson is, he has some emotional and behavioural issues that I find to be quite challenging. My DP says he has had these problems since he was a toddler and still with his mother. However, his mother is in denial (doesn't happen at her house), and although my DP says he will take action in terms of finding a way to help DSS, he never does. As it stands DSS comes over every Friday-Sunday evening, and during the school holidays.
I have found over the period of a year, that I have now come to dread DSS being here, it actually causes me stress and anxiety. I feel like a passive bystander with no say, as his behaviour affects me and my other children, and even the things we can do as a family.
At the verge of walking away, I suggested to DP recently, that as a compromise, DSS temporarily be returned to his mother on Saturday evenings, rather than on Sunday. But DP would rather move out with DSS, leaving my other children and our child together without him, than change the status quo. Is this at all reasonable on either side?