My half BIL whom we have custody of got upset with us the other day over not having called to tell us that his friend's brother was going to pick him and his friend up after basketball practice so he could spend a little time with his friend working on a project for school. We have a rule that if he's going to change plans on us, he needs to call and let us know. There's a little store near his school so there's no excuse or he could have borrowed the brother's cell phone. Technically, we aren't his parents, but how would you have responded to this? His mom's (my SMIL) been in and out (more in than out) of prison his whole life which is why her rights were terminated and my FIL has been deceased for 4 years. My other SIL probably could have taken my half BIL in, but she's a single mom and has an apartment barely big enough for herself and her 7 year old daughter.