No matter how old you are... or in my case, freak out and call dad so he can calm you down.
Dad's are CRUCIAL to a child's development - ESPECIALLY a girl - WAYYYY more so than a mother. Mom's - PLEASE do NOT feel threatened by this & encourage it if you want your daughters to ever be able to experience a HEALTHY LOVING relationships & it's CRUCIAL that YOU show love/respect for him - EVEN if you're no longer together!!!
I hope he knows that. Some times, I neglect my family, and I know I'm very lucky to have them, even though we disagree a lot. I feel like my dad is someone I spent a lot of time fighting with even though I love him very much. I'm sorry, dad. I hope in the coming years I'll be the daughter you hoped I would be for you. ♥