Mil issues

Hey girls I just wanted to vent and any advice or similar situations. I love my baby so much . I always want to be with him , but at the moment since I have school or need to do something I let my mother in law watch him. This morning I got up to wash the bottles and make him a new one I left my baby with my husband. My sister in law who is 17 goes in the room to see the baby, I go back in the room and my husband gives her the baby and she leaves . She gives my baby to my mil and comes back asking for diapers and a blanket. It hurts my feelings cause I was about to feed him and just that he’s always with someone else , i don’t want to be rude and say no to them . I usually let someone take him for a while but with my consent am I wrong for overreacting?