I had a dream last night that I went to this girl's house who I have never been particularly fond of. She recently had a baby, and we were sitting on her couch. There were other people with us and we were on other couches and such.

I had a glass of white wine in my hand and a woman who must have been her grandmother tossed the bottle of white wine at me, catching me off guard, and I dropped the glass on the floor. The white wine in the glass started staining the purple carpet with yellow splotches and the wine glass broke on the floor but there was no glass.

I was going between crying and apologizing while saying I would pay for the floor to be recarpeted, and screaming and being angry while smashing whine glasses on the floor.

What could this dream have meant?
This girl has never done anything to me. We just have never been friends.
I am in a casual sexual relationship with her cousin.