Someone accused my dad of molesting a 5 year old

Okay so my dad went to visit my brother and his wife. His wife has one daughter that she had before she met my brother & one daughter with my brother. So the oldest daughter said my dad was touching her inappropriately! She showed her mom where my dad had touched her and she pointed to her vagina! So I asked my dad and he said “I was high I don’t remember that” wtf! Now that’s making me believe he did it! What you ladies think? I’m cutting the mother fucker off cause I’m highly pissed at this shit right now! Then on top of that a 21 year old girl wrote me on Facebook messenger saying she’s pregnant for my dad and he’s denying the baby! Holy cow! I looked up to my dad but now I’m starting to view him differently!