AITA for kicking out my gf, cause she hates that I cosplay as Marisa during sex?

I know the title sounds bad but please hear me out.

I (23M) and my gf (25F) have had complications with sex our entire relationship (4 years), but recently we’ve started having more and more sex recently! I loved my gf, and she loved me, or so I thought...

Now onto the story: I have been a massive Touhou fan for years, I have all the merch and Fumos. But my gf thinks it’s an “unhealthy obsession”, which is just completely and utterly false! We were in the mood 2 days ago and we started having hot steamy sex, and I was cosplaying as Marisa things we're fine, my gf tolerated me cosplaying as a teenage girl in a witch outfit but while I was grunting I said “Oh yeah Alice, I'm gonna steal you're precious thing!” And my gf instantly said “WHAT!?” Alice is the name of her sister coincidentally, realizing my mistake, I said “Nothing, probably just the wind.”

We continued going at it and we were reaching the climax, as soon as I came I yelled “Alice! Feel my Master spark!” And she threw me off instantly and yelled “I’m done! I hate you and I hate your stupid Touhou! I hate that you keep dressing in a girly witch outfit, and I’ve been ♥♥♥♥♥♥♥ another guy because you won’t shut up about "Touhou’" and you keep calling me Alice!

As she was yelling more about I realized something... she had sex with another man... which meant... "You Maricucked me?! Damn you Luke! You've done it again! When is enough enough!" My gf stared at me like I was insane, so I explained to her simple plebian mind the expansive Maricucked lore from my favorite ♥♥♥♥♥♥♥♥♥♥♥ subreddit.

Once I finished explaining she grew red in the face yelled that we are breaking up. We yelled at each other some more, which ended with me kicking her out of the house.

She has now moved back with her parents and I’ve been thinking about what happened, I personally don’t believe I’m in the wrong, but I want to hear it from Reddit.

AITA?....
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