People on this sub are fucking hypocrites lol.

It's totally okay for you to be turned off by the fact that she would like to have more than one guy at the time. If it was the other way around (you asking for a 3-some with another girl) and your gf would have made this post, people would be cheering for her and telling her to dump you because you would end up cheating.

That being said, she did bring up an actual fantasy she had and it must have been very hard for her. She also respected your boundaries so I think you need to be aware of that when making a decision.

I think you might have some little confidence issues about that, but I think that's understandable given the fact. I think that since you've been in this for 8 years, you might wanna try seeing up to where you can satisfy that fantasy of her's without leaving your boundaries, You can try using dildos and the sort, as it was mentionned previously.

Then, if you see she's still not satisfied, you're in the right to wanting to leave her, because it's an issue that could linger for a long long time.