Is AUTHOR wrong in the post ? POST : My girlfriend and I have been together for 6 months or so.  We have been thinking about moving in together so she's been staying at my house over the weekend Friday - Monday night (she's off Sunday and Monday).  

He's twelve but she hasn't trained him very well and he doesn't listen.  I should also mention that I did not grow up with animals and have no patience for torn-up furniture, stolen food, etc but my biggest pet peeve is the dog doing his business in the house.

The dog poops any time we leave the house (she refuses to cage him while we're not home) and tears things up.  He even poops and pees in front of us.  And any time we have sex.  She insists he sleep in the bed (which is gross but whatever, I can cope) but anytime we get down down to business, so does he.  As soon as we get close he jumps off the bed and starts sniffing around.  She yells at him but it doesn't stop him.  Even if he's been out to go recently the dog will find reserves and leave a steamer in the middle of the room.  I can't have sex while I'm waiting for the dog to take a dump at the foot of the bed and she just wants to ignore it and keep going.  

We had a big fight yesterday.  She says that she can't help it of her dog acts out and that it's "not a big deal." But it is a big deal to me.  I don't like that my furniture is torn up, my house smells like dog shit, I can't do this.  

Am I the asshole?

TL;DR SO's dog poops and pees in the house, tears things up I want girlfriend and her dog out of my house.