This is a good chance for you now to venture out and try different partners too if that's what you're interested in.
Maybe I'll throw this in the mix though - are you a bit jealous of the fun she's having? If so, then maybe asking for more ffm 3somes would help to balance the fun-equation a bit.
Take the risk of thinking for yourself, much more happiness, truth, beauty, and wisdom will come to you that way. - C. Hitchens
Me: Male, bi, 48, flexible