ok, so u know he's doing it, he claims there is nothing wrong with it and keeps on doing it.. it may just be flirting from the start, some may see it that way, but one thing leads to another right? are you going to wait till the smoke turns into a fire? if you're not married, do something before you take another step that you're gonna regret in the future..if he's happy enough doing it over and over again and thinks it's ok, then what does that tell you of him..

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