To be turned on by my cheating b*tch gf cheating in front of me??

So last Saturday me & a "friend" are at my house playing our favorite video game. My girl comes back in from having brunch with her friends and i can tell she's tipsy.

My asshole "friend" is talking shit and calling me names about how he's whipping my ass on the game. While he's talking shit he slaps me upside the head multiple times, dominating me in front of my gf...

Hes then like " When i beat yo ass this time yo bitch gonna come suck my dick!"
Then he beats me cuz hes an asshole & yells loud asf

"Come over here & suck my dick bitch!"
She acts turned off but then sits by HIM!
He repeats it & she then just starts sucking him off...

Is this normal?