My wife (32) and I have been together for about 10 years, married for 5. My wife’s sister, Jessica, is 27 and about to get married in a few months. I’ve known Jessica since she was a super innocent and naive high school kid and has always felt like a real little sister.

She’s always been super into fitness and has a great athletic body and big tits. I’d guess a nice C cup based off my wife being similar. She has long brown hair and often has a decent tan from being outdoors a lot.

Anyways, ahead of her wedding, she wanted to do a boudoir shoot for her fiance (my wife did one for me, which is amazing, and she’s using the same photographer).

Last weekend, she was in town for her scheduled boudoir shoot that Sunday and was staying with us Saturday night.

On Saturday my wife was at a work event all day so it was just me and Jessica.

Since they’re roughly the same size, Jessica was planning to borrow some lingerie that my wife bought for her boudoir shoot. Jessica asked for my help in finding where my wife kept her lingerie and I showed her where she had it kept. She thanked me and I left her alone in our bedroom to try on the lingerie.

“Eric, can you help me tie the back of this?” she shouted to me through the closed door. My heart started racing and I jumped at the opportunity. I lightly knocked on the door and opened it slowly. There was Jessica in lacy untied corset, a white thong and white long stockings. I instantly got a raging boner that I tucked into my shorts so she didn’t see it while her back was turned to me. “Can you tie it tight?”

I couldn’t believe how casual she was about this, it was like the relationship she had with my wife, just very free and open.

“Thank you,” she said and I left the room again but left the door open this time. I heard her rustling with other clothes as she went to try on the next outfit.

“Eric, what do you think about this one?” she shouted to me again, and again I came running in. This time I didn’t have time to tuck in my boner and it pierced through my shorts when I saw her. This time she had a see-through black top and a red thong. I could see her perfect tits through her lingerie and I got lightheaded.

She noticed my boner and chuckled but played it off. “Can you take a pic for me?” and she passed me her phone. My hands were shaking as she made a few super sexy poses.

“Any poses Rachel did that you like the best?” she asked.

“Uhh yeah…yeah, there’s one I love where she’s on her knees in a downward dog pose but reaching back to take off her bottoms.”

She assumed the position and looked at me. “Like this?” she asked softly. I took another picture on her phone and showed it to her. “Actually can you arch your back more and stick your butt up?”

She arched her back and started slowly sliding off her red lace thong and I snapped a bunch of photos. She was neatly shaved and she looked amazing.

“I guess I’m doing a good job,” she chuckled again as she looked at my boner. I was blushing like crazy but whatever. “You should do a boudoir for Rachel too,” she said half-jokingly.

“Haha no I think she’s good without that. I don’t think I have any sexy poses she needs to see.”

“That’s not what she told me…I think you’d be surprised. Cmon give me your phone and we can send her some pics.”

“Maybe next time…” I chickened out, and left Jessica to get dressed. One of my top regrets but I can’t imagine my wife would’ve been thrilled to know we were taking pics. Probably the right move right?