Aw, Apollo and Midnighter! Their real superpower, of course, is being super-gay and ultra badass at the same time. Trufax.
(To be fair, they don't let Jenny smoke so much as they can't stop her, because she pulls those things out of thin air. I've always loved that bit in Revolution when Jenny abruptly goes from, like, six years old to about fourteen, and has just about managed to calm Apollo down when she casually lights up and freaks him out all over again. Hee.)