Making a guy wear my bathing suit shorts and gently busting him (Realistic Fiction - Female Perspective)

*reading the latest series from u/funkybusted (My Sister's BFF Zoey...) made me remember something that happened in my past so I decided to write a story inspired by it.*

I used to date this guy who came from a pretty well off family. They weren't super rich, but upper middle class and many of his extended relatives had time shares, cottages or vacation homes located in the mountains for skiing or on the beach for summer vacations.

One of the family's favorite places to go during the summer was his aunt's beach house. His family would always spend two weeks there every year and each sibling got to bring a friend. It was a packed house but luckily his parents were cool with us, as the oldest and only other adults, sleeping in the same bed and having a room all to ourselves while the 4 younger ones all slept together in the living room.

One night before bed I was wearing my bathing suit under my clothes. My bathing suit bottom was this pair of bright green boy shorts and when I was taking them off to put my pajamas on I dared my boyfriend to try putting them on.

He hesitated, not wanting to put them on and asked me why I wanted him to. He was so skinny and I wanted to see if they would fit and how they would look on him. He reluctantly tried them on after some persuasion and I joyfully giggled as I watched him slip into them. They fit him really well and hugged his package nicely.

After a few seconds he felt self conscious. I think he was particularly concerned that someone else might open the door and see him. He went to take them off but I begged him to leave them on. He said no and moved his hands to his waist to pull them down and I grabbed onto the little bulge between his legs and squeezed as I pulled him in for a kiss.

I distracted him by placing his hands on my chest and reached back down and grabbed his package again. I could feel him getting hard but there wasn't much room in the tight shorts for him to grow.

He tried to take the shorts off again but I pushed him onto the bed and crawled on top of him. I told him that I'd keep playing with his junk but only if he kept the shorts on. He was a wuss when it came to ballbusting and he didn't want it at all. If the shorts came off he'd only want me to touch his cock but if the shorts stayed on then I got to play with his balls too.

Our relationship was pretty toxic by that point so I didn't care very much about his feelings and was having fun treating him this way for my own amusement. I laid next to him and held him down while I stroked and lightly slapped his crotch. I don't even think he liked any of it but he didn't put up much of a fight.

I watched his facial expressions and felt his body react as I squeezed his bulge. I felt his body tense up as I squeezed him firmer. His body relaxed as I let go and then jolted when I slapped his crotch. I slapped him a few more times, quietly laughing as I felt him flinch with each hit.

*Since I asked you guys what you would do at the end of my last post, what would you do in this one?*