My mom, two sisters and I are very close. Dad left a long time ago, so it's just been mom raising us. She had her own home business and did pretty well, so we never wanted for anything. We weren't rich, but we weren't hurting either. Anyway, we liked to copy some of the challenges we saw on social media. The latest was the tickle challenge.
So, we tied Tina the youngest at 18 to a chair and tickled her. It was a 15-minute challenge. Tina is blonde with blue eyes, average height and has a bellybutton piercing. Her arms were extended over her head and her legs were spread over the seat of the chair. I tickled her armpits while mom and Gina ticked her stomach and thighs. After five minutes we switched. It was tough with her clothes on. If she had been in a bikini or bra and panties that might have been more fun. I'm no pervert, it wasn't like I wanted to see my sister naked or almost naked, but from a tickling standpoint actual skin is more ticklish as I knew first-hand from a couple of ex-girlfriends. Having just said I wasn't a pervert I might have accidentally touched her medium sized breasts as she squirmed around in the chair while I tickled her. When I got to her thighs, she squeezed them shut on my hand and I swear I felt a dampness between her legs. Did she just pee on herself?
Gina was next. At 20 she was more of the wild one in both looks and personality. She was shorter than Tina and slightly heavier. She certainly had bigger boobs and it appeared she wasn't wearing a bra (she hardly ever did). Her roots were black down to a point then the rest of her shoulder length hair was dyed blonde. I started with her knees and worked my way up. Then I tickled her stomach while Mom tickled her armpits and Tina tickled her thighs. Just to prove my point of her not wearing a bra (although it was pretty obvious with her tits bouncing all over the place) I reached under her shirt and tickled her ribs. Her naked boobs brushed against my hands until I heard mom say, "Robert, not under the clothes". That was fine. I had my proof and so far, I'd basically felt up both my sisters. Maybe I was a pervert after all.
Mom was next. She had red hair (natural), wore glasses and was in good shape.
Might as well go for broke, so as I tickled mom, I also accidentally touched her boobs and inner thighs.
Mom said we needed a break. We all used the bathroom we had two so two people went at a time in different bathrooms. When I got back mom had poured us all a beverage. I didn't notice the slight cloudiness in mine and drank it, more or less in three gulps.
I woke up to find myself tied to mom's bed. I head mom and my sister's talking.
"The little pervert actually felt me up," Gina said.
"Well, you aren't wearing a bra," Mom pointed out.
"That shouldn't matter," Gina insisted.