My Wife Is Messed Up In The Head

When it comes to sex at home, my wife is kinda bland. A few positions, some oral, thats about it. Now when we stay at a hotel something changes. She wants me to piss in her mouth, fuck her in the ass, spit on her and slap her around. Last time she picked up 2 sluts at the bar for an orgy, and the time before that she did double anal in a gangbang with me and 7 other guys. Now I don't my her being a filthy fuck pig, but I don't understand why she can't be like that at home. I know we have kids, but even before that it was only at hotels. I've asked her about it, but she seems confused as to what the difference is. Does she have some sort of weird split personality. All I know is I can't keep paying for hotels, and the kids go to grandma's a couple nights a month, so why not cut loose at home. I guess thats all I can say for now as I gotta go pack my overnight bag and start drinking a gallon of water.