At the workplace, during travel, we ended up swapping our girlfriends for sex! Her girlfriend was half-forced into it and, with a slightly resentful look on her face, she grinds on top of me. Seeing that expression flipped my S-switch and I went all out! I gave it to her hard, filling her up with cum. I can't wait to see which one of us the kid from the blended sperm will be!
