I’m going to be a cuckold aren’t I?

3:43 pm in Cock Humiliation, loser dick, penis humiliation, small penis pic, tiny dick humiliation by Mike

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I’ve been dating my Girlfriend for over 4 years now.  I’ve always known that I don’t pack the biggest stick of dynamite but I figured it was decent enough.  We’re both very kinky in the bedroom which I think is the reason we’ve been together so long.  We’ve played with chastity (longest I’ve been locked is 5 days)  and a few nights ago  while we were at the adult store she grabbed a 3 inch penis extender and told me to buy it.  We used it that night, the next morning, and the following evening.  Last night she told me that she doesn’t plan on fking me without the extender on.  My questions are is it really that small that it needs an extender every time? Do you think I’m gonna get cuckolded? and should I give the keys to my chastity to someone who won’t let me out so easily? We’ve discussed it before and I told her I understand if she wants to sleep with other men just so long as I know about it and I’m locked in chastity when it happens.