I usually walk around the house in a careless manner, and my sister-in-law arouses me, causing me to inadvertently get an erection. Worse yet, she caught me! Shit! But then she said, "Isn't this a bit big?" as she forcibly pulled down my pants, and her expression was sparkling! Then it was my underwear's turn! Even though we're only siblings-in-law, if I refused, she begged, "Just for a moment... even through the underwear is fine," drooling as she couldn't resist my huge dick!
