我的继妹发现我在自慰，她告诉我，如果我让她操我，她就不会告诉我的丈夫

My stepsister is in the house where I live with my husband, suddenly she discovers me masturbating because my husband doesn't please me, she tells me what she is going to tell my husband, I ask her to please not do it, then she tells me that I won't tell her if I let her fuck me too (Spanish)