Well Mohinder still has his vendetta against Sylar, "you killed my father, prepare to die". So if he happened to see Sylar somewhere he'd probably be willing to stop what he was doing to try to attack Sylar, because "now I have supper strength and will win!", but Sylar still is full of win, and could just use TK to pin Mohinder to the bed. Then they somehow end up having sex, and Luke walks in on them? I like the idea of Luke and Sylar sharing Mohinder, mainly because I like Mohinder as uber sub.