What a bitch I am!

I was in the bath and wanted to get ready for bed. Suddenly the door opened and my stepmother's new stud was standing naked in the bath with a boner. He'd probably just had sex with my stepmum and was visibly embarrassed. Only I, the little slut, had to take advantage of the situation while my stepmother was just one room away and I let him fuck me in the worst possible way. She must have heard that as loud as I was screaming. Every now and then I ask myself if that's still completely normal ?????? Am I already such a slut ?????