I don’t suppose I should be so surprised because all the signs were there. Upon thinking about my stepson jerking his cock on me, I decide maybe if I let him play this out he will stop this behavior. So I invite him in. I take the panties from him and start stroking his cock with them myself. Then I remove my towel and lay back on the bed naked. I fuck him but tell him that he has to let me know when he will cum because stepmommy is not on birth control.