So me and my girlfriend are completely in love with each other, but this Christmas we weren't able to spend it together. She went to her uncles house where the adults have their party and the "kids" have their own party. So she was drinking and she went to sleep around 1 or 2. The next day I text her saying good morning and she says that she's sorry. I was just wondering "sorry about what"? I thought she was apologizing because she got drunk by then she told me that she made out with a girl. I didn't think of it as much as first because she did that before by it still bothered me. I said that it was okay but she said that they did other stuff. Apparently the other girl took advantage of my drunk girlfriend and when she was taking a shower she decides to go in and start making out with my girlfriend and she starts FINGERING HER! I don't care if she is a girl, oh don't do that to someone in a relationship...
My question is, is that considered cheating?

So you are dating someone who has a drinking problem and will do things with other girls, so she is bi sexual also.

That is no excuse for messng around, people blame drinking when they do things they want to do. So it is up to you, this is cheating as much as if it was a guy, so you have to decide. I doubt she is that in love with you if she is doing these.

Yes its cheating, AND bad irresponsible drunken behavior. Her being taken advantage of is debatable.

It is Cheating!
The word I was drunk sorry my bad

Just does not fly!
As for being taken advantage of? HA!
Ok if she was walking down the road and a guy or a girl jumped her forced a gun point to do things yeah! Ok

But jumping in the showered together after they were kissing is following a lead that was given by your girlfriend.
Action has a consequence's.

But I must admit as a guy myself you tend to think Oh its with a girl its cool! I'm happy with that its not as bad as it is with a guy.
But wait.. It is! Just as bad its cheating on you my friend
Now imagine if it was a guy she kissed that night.
You would go off!

People in love do not do those things to each other.

I wish you all the best in your actions