She's on her period but offered up a bj so naturally I accepted.  It was  good one and I was on the edge nearly the whole time.  As she sucked I gave her a countdown to my orgasm, since she prefers I don't blow in her mouth.  She misinterpreted my countdown and got hit with the first blast right into her sweet mouth.  Then the rest I stroked out onto my belly.  She was cool about it, but definitely took in some quick water and wiper her lips.