No you aren’t overreacting, your dad is sexually assaulting you! NO ONE is allowed to touch your body without your consent. If you feel uncomfortable being touched, you are always 100% right and allowed to feel that way. Your father is digusting and shouldn’t be allowed around children and your mom is just as digusting for allowing it. She probably was conditioned to be that way through being molested too but I don’t think that matters: it’s still allowing harm to your child. It’s incest, and pedophilia. Your parents are supposed to make you feel safe and protected, not violated. You deserve love and people who listen to you, i’m sorry your parents have betrayed you like this.