<human>: Okay, so my girlfriend has this little chihuahua mix who loves attention.  She brings her dog everywhere, (even to class - she's a dog trainer and she managed to swipe a service dog vest), and tonight she brought it over to my place. We're in my room, and the dog is hanging out with us. We hadn't seen each other all week so naturally, we were pretty ready to go at it. So we do. Her dog is usually pretty polite when we do it, and hides under a table until it's over. So we do the deed and afterwards we're lying on the bed making out. My girlfriend was still horny so she asked me to go down on her. So I do, and everything is going fine - until her dog jumps up on the bed. She's not paying attention at all, she's into it. I, however, had already finished, and noticed her dog sniffing around, looking for attention. So I chuckle, look up, and say, "I think she wants to help." 

My girlfriend lost it. She freaked out, pushed me, and said, "get the fuck off me." She's pissed and won't stop calling me gross.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Going down on my girlfriend, dog wants attention, joke about her dog helping, she never got off and is pissed about it.