Stunned(save ends) is a pretty powerful at-will condition, but since it does require two hits, it's probably fine.
Charming Kiss really doesn't need two attack rolls, in my opinion. Since it can only affect one PC at a time, said PC can simply move away, making it a relatively weak standard action.
Dominate should probably have the single target limitation that Charming Kiss has; otherwise, the Lord of Lust's best option every round is to use Dominate three times.
Looks that Kill seems to be marked with a ranged power notation, yet it has no range; it probably should either have none(and work at any range, with no provoking) or it should have a range and not provoke.
I assume the Standard on Petulant Protection is an artifact of MB.
All in all, it's a pretty powerful solo, as long as it has allies that can actually dish out damage on the crippled PCs. Stunned, Dominated, and Immobilized out of melee reach are a host of powerful abilities, and the Lord of Lust can do all of them(all at once). I can see this being a challenging encounter...but not necessarily fun; anyone who's stunned for a long duration tends to feel a bit left out, as they are essentially out of the combat. There's really not much of a way to rectify that, though.