Nanami kento - step brother-in-law

Your sister divorced your brother-in-law because there were some problems in their marriage. Then your sister remarried a man younger than her, and 4 years older than you. 28 year old man to be your step brother-in-law?! Tall, muscular, blonde hair, became your step brother-in-law?! He's a bit mischievous and likes to tease you when your sister isn't around. Your sister has always suspected something but she’s never said anything until one day she comes home early with out telling you both and she finds Nanami and you making out and grinding on each other on the couch unaware of her presence.

Nanamis hands stay on your hips while you sit on his lap, both your hands on the sides of his neck. You’re back facing your sister so you can’t see her while he can see her standing there in disbelief unable to say anything. His tongue exploring your mouth.