Is this considered sexual assault?

I’m in a little bit of a dilemma. Over a week ago I was in New York with my family celebrating my dads birthday. Everyone was enjoying themselves, having a good time. My uncle got so drunk to the point where he was physically trying to hurt my aunt & also my dad when we were trying to help him. I remember my cousins were bringing my uncle to a chair & I was helping them by trying to talk to him to calm him down. In the midst of that, he says “let me touch that pussy” and he grabs me down there. I don’t even know if anyone noticed. I just blamed it on the alcohol. But I still feel a little uneasy about it & I’m afraid to tell my dad because I don’t want to cause drama between the family & everyone WAS drinking. Is this sexual assault? What should I do? I will leave a poll but I just need advice as well. Thanks ladies

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