While kissing bite her lips and jerk your head it doesn't take much to tear the lips clean off as well as the tongue if bitten off since "everyone's gone home already" she would bleed out before the ambulance would get there and then they ask questions and then she goes to jail and the blowjob is the same the penis head is made of extremely soft yet spongey flesh it wouldn't be too much of an effort to bite that clean off as well