I finally let STBXH have all of Sunday (supervised with his parents/grandmother) with DS, and he only asks for 2 hours! This is his second Sunday and I asked him why only 2 hours and he came back and said fine 3 hours. He was the one claiming I didn't give him enough time, and that I was keeping DS from him. Truth be told when he actually has to care for him, it's not that much fun for him.