found out my dad is a pedo

i don’t have anyone to tell and i’m not even supposed to know this but i need to get this off my chest and get some ounce of comfort. i went through my moms text messages because i was curious and didn’t expect to find anything. she got sent an email from someone who made a porn game about me (17 at the time) and my younger sister (15 at the time) for my father. apparently whoever made the game recorded him masturbating to it and sent it to my mom since he didn’t pay them. i don’t even know if this is true or some kind a scam but my mom definitely got sent videos. there was no proof of the so called game of me and my sister existing but i don’t trust him at all anymore. i found out last summer and no one even knows that i know. my parents are still together but my mom intends on divorcing him once she gets the money for it. i’m 18 now and starting college but i still live at home and will until i save up enough. i just started therapy and intend to get help for this but i need to admit that it happened before i get help.