Okay so, I had been staying at my Grandpa's house because my cousin was down and I hadnt seen him in a while. I stayed three nights, and we had to share a bed because there wasnt enough which I didnt mind because we were pretty much like best friends anyway. He's 14 and I'm 16. On the first two nights, we snuggled and he always rubbed my legs, back and tummy etc but I didnt think anything of it because we were close and cousins. This morning I was having a dream of someone rubbing my vagina, and I woke up mid dream and found that we were in the spooning position and his hand was in my undies, and his fingers were rubbing in and out. I freaked out and jumped, and his fingers went back to my tummy, then he started rubbing circles and I moved to the other side of the bed, not saying anything. I didn't know what to say!! I was so surprised that he'd do something like that!!!! He then texted me saying we had to leave, and we had a little fight over text over it and he made up that he "didnt know what he was doing" and i was like WTF, he knew EXACTLY what he was doing! He apologised (through text) and I pretended to forgive him. I didn't tell anyone and we didnt really talk as much throughout the day, then mum came and picked me up. I don't want to tell her because I'm scared that she won't believe me and idk how she'll react; it's her sisters son.
What do I do? Please help! xx