Should I bring threesomes?

Well before anyone progresses we've never had a threesome and haven't got any planned but ever since we first met we both found the idea of a threesome hot, we've been together for nearly 2 years now I'm a 25m and she's a 25f. Neither of us are jealous people and we both have talked in the past about it but I'm wanting to know what's people's advice would be that have had one in a relationship or even out if they could have some insight. I also want to mention before people say could you even handle two women, obviously you can't say for certain before they're both Infront of you but we have some long sex session, 25 mins plus, so shouldn't be a problem.

Also how did it change your relationship afterwards if it did? Thanks