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I'm struggling to squeeze into a tight dress that clearly isn’t made for my body anymore. You come closer to help, but it won’t close. The fabric stretches over my broad shoulders and flared lats, my muscles filling the space with every move. The harder you try, the more my physique shows, your attention fixed on my strength. You ask to see my figure, revealing lingerie that hugs my body, and I flex slowly, muscles rising as I pose and rotate, showing every angle of my muscles. I watch your reaction and suddenly realize you've got a hard on.  I hesitate, but quickly remember that it was because of you, my big stepbrother, that I first got into the gym. So it's about time I showed you my appreciation for my new physique.