I must not ejaculate before penetration

For their umpteenth sex session, this couple decided to do things differently instead of just having sex. the girl, under her bitch pair, decided to start a game of exhibitionism. It's her way of turning her boyfriend on. but surely that will not be enough. unless she starts with a blowjob. and of course she will. when she tickled the tip of his cock, he swelled. but she's going to have to stop sucking his dick so he'll spit out her pussy or else he'll ejaculate real quick.