Some months ago, my gf mentioned wanting a threesome. I didn't even let her finish or explain, cuz it did not matter to me. It didn't matter who it was, the answer was an immediate no. She was like ok.

She brought up again some time later, she asked again, I gave her a resounding no, and that's it's never gonna happen.

The third time she asked, was pretty much my limit. I told her we were done. That if she needs a threesome so bad, leave me out if it, but we're done.

My gf tried to convince me to talk about it, but I told her it didn't matter. She told me if I should have told her this was break up worthy.

Idk, I don't regret my stance on the whole threesome some thing, but should I have explicitly said "Stop asking for a threesome or I'm gonna break up with you?"