Capitulo 1. Two stepbrothers and a pussy: I can't stand the temptation and end up doing something crazy. Is this infidelity?

When I was about to have sex with my husband, his stepbrother arrives by surprise, this unexpected visit damages the sex plans, but I am very horny, I go in silence to where my husband's stepbrother stays and I masturbate in front of him, I don't know why I'm doing this but it excites me a lot, lust takes over my body and even though he wakes up I don't stop touching my wet pussy until I have a big squirt accompanied by my orgasm, I still don't believe what I did. What will happen tomorrow? OMG, is he telling my husband?