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My boyfriend wants sister threesome

My boyfriend has a fantasy of me and my sister touching each other and then he joins us and we have threesomes. my sister would never agree to that and I don't like it but my boyfriend keeps insisting.
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Sounds like fun 😁
Elena96 · 26-30, F
@Oysterman even if me and my sister don't like the idea?
@Elena96 if you guys agree then let the fun begin, if you don't want to then he should let it go