The perverse PLEASE of my SISTER! Loyalty test escalates

I didn't really want to go that far, but what was I supposed to do? My sister asked me to test her husband's fidelity. Well said and done... I put on a cool outfit to see how far he would go... Well... From the looks of it, he would go VERY far! I just couldn't help but treat myself to it! I didn't realise she was so lucky with that cock!!! He just fucks me mercilessly!!! Would you have been able to resist?