Lia had suspected something like this might happen as soon as the stranger had approached. It wasn't that she was necessarily irascible about etiquette, though she did think there was a certain way people should talk to each other -- especially a gentleman who wanted to court a lady, or even a guy who wanted to talk to a girl. But once you brought another guy into the mix, things got complicated.
There was nothing sexual between her and Vince, it was true (putting aside those occasions when they were in the mood and felt like making out like a pair of impossibly skilled teenagers). Even so, not only was it extraordinarily poor form to approach a woman who was obviously enjoying the company of another man, it was kind of asking for the kinds of threats that Vince was currently making. Especially if Vince was the man in question.
Lia sensed the satisfaction in the guy - she looked up at him and realized that (as much as she might have liked to think so) this little altercation wasn't about her. It was about Vince; probably his unjustly good looks, his impeccable style, his obvious wealth. Not that Lia was one to sell herself short, but in this case, she was just the easiest and most obvious bait.
That, in itself, was irritating, nevermind the interruption of a perfectly pleasant evening. Even so, she slid further back into the couch, watching carefully. He was a big guy, but clearly drunk - and she'd observed in the past that Vince was more than capable of handling himself. Her main concern was that they didn't knock over the hookah, or the drinks, and that she didn't end up with a bruise or other injury in the process.
For his part, the burly drunk sneered at Vince, saying, "Yeah, go fuck yourself, fag. I just thought this little kitten might wanna break from talking about shoes or whatever the fuck with you."
With that, he put his hand on Lia's shoulder, sliding the strap off of it again.
He smirked drunkenly. Lia's jaw dropped, stunned for a moment that he had actually had the balls to touch her to prove his stupid, dick waving point.