Is my friend a lesbian?

Soo.. I just had my birthday party. I invited 5 girls and we were all drinking. Soo. anyways. This one girl drank the most (I think). I have drank with her before and she had like half a shot and acted shitfaced so I have a feeling she is just pretending to be drunk when she isn't, but I really did think she was at least tipsy at the party.

To the point. She kept grabbing my ***, like full on GRAB. Not pat or smack but GRAB and it was reallllllly irritating me. I kept telling her to stop but she wouldn't. She kept poking all of our crotches and trying to shove water bottles into our crotches. Yeah... Then she kept falling on us like she was shitfaced, which she may have been but when I'm shitfaced. I have the sense not to be so loud my parents might hear and she was out of control! She would fall on me when I had the bottle in my hand where I almost spilled it. I mean. ****. Some common sense.

She also kept biting us

Then she got whip cream in her hair (we were eating pie. I don't know how she did that) then started saying it was my friend's "vagina juice" in her hair

So I understand affectionate drunks. Like two of my friends kept hugging me and cuddling with me (I was drunk too) and that makes me feel loved and nice but I did NOT like being violated and constantly touched like that and we told her to stop. But she wouldn't

Then I asked her closer friend at the party if she was a lesbian or bi. She said no then ended up telling the girl acting weird I said that.

Then the girl said "Why did you think I'm a lesbian? I have had a penis IN me. IN me"

Yeah. So she had sex once from this guy she met on xbox live. Long and weird story that I don't really approve of. But I almost think it was a coverup or she did it because her friend lost her virginity.

So why was she acting so weird? It wasn't just an affectionate drunk thing. She was taking it wayyyyyy too far. She also kept trying to kiss my other friend.