Stepmom: "You can fuck me in all holes for the rest of the trip and we'll forget about what you heard"

My stepmother and I came on vacation. On the very first evening, she left without telling me where. The next morning, she returned disheveled and without panties. I began to ask her why she looked like that, but instead of answering, she offered herself to me, saying that I could do anything, just don't ask me about where I was.