He was doing that thing he did - that thing where he appealed to her sensuality instead of her greater sense. Intimacy was catnip to Lia, particularly with someone she already cared for very much. Of course, there was always a line with Vincent Alexander that needed to be maintained and watched carefully - because it could move. They hadn't managed to stay friends this long by sleeping together, and Lia had known from the first that sex would ruin everything between them. By and large, the women he slept with did not enjoy true intimacy with him, and they tended not to stay around for very long.
Beyond that, there was also the perhaps paradoxical fact that while Lia liked to flit from flower to flower from time to time herself, she also had a nasty penchant for unbecoming displays of jealousy in certain scenarios. While there was no guarantee that a fling with Vince would result in that kind of behavior, with their friendship at stake, it really wasn't worth the risk.
But none of this precluded cuddling, in Lia's mind.
So she settled down next to him, keeping a proper hold on her drink, shaking her head as he explained the situation, listening carefully, then taking a slow, small hit from her own hose. "So then she's OK with you sleeping with other people?" Lia asked, cutting to the heart of the matter. When it came down to the nuts and bolts of a relationship, euphemisms and politeness didn't necessarily help anybody.
Then, after a second's thought and another little hit, she asked, "And why in God's name would your dad set you up like that?"