Is anyone not with there kids father but still deals with his family? Me and my kids father haven't…

Is anyone not with there kids father but still deals with his family? Me and my kids father haven't been together for a while now. I try to keep and touch and everything for the kids and stuff like that there dad literally does nothing for them . But they never ask for the kids or anything and will watch them if I ask why is barely ever but they have a nerve to call me and ask me to take them places on my day off mind you I work 4 days a week off on the weekends but I don't really get a break but Monday after I take the kids to daycare that's when I get a little break smh sorry about that rant just so irritated