Well going by hentai logic I give her 50/50 odds of either turning back after 30 orgasms or falling in love with the last guy she had sex with. I suppose she's lucky it was just one guy in this case.
@Senkoau I'd also add the possibility of the curse being transfered to the person she's having sex with (or last had sex with) when reaching 0. That could allow the curse to punish both of the people involved in the accident too.
Base +6, Quasi-Evil_Overlord +6, m42a +17, Der Fuhrer +7