Accidentally fucked my wife's stepsister

OMG, what am I thinking? Yesterday we were walking with my stepsister and her husband, when we went home, my stepsister went to the post office, and her husband and I went to the apartment to wait for my stepsister, her husband and I were left alone in the apartment. We get along well with each other and get mixed up a lot. Only this time we've gone too far. On the way up to her apartment, the elevator was quite cramped, and I had to;) very hard to press your tender ass to it! OMG and of course I could feel his cock getting harder and harder! I was so excited... Have we been caught? Figure out;)