Oh, so is it that you are not comfortable with your male partner having another woman then?
You will see us rail at the inherent sexism in OPPs. Like males are somehow so desirable and have "what women want/need" ie: a penis. And of course if the woman dates another woman, that woman isn't threatening because of her lack of penis! Try telling that to lesbians. Some girls have cocks (transwomen), and some buy and use them (dildos or strapons). And of course, there are always nice strong fingers for penetration, or even fists.
So, that's been covered. Are you leery of another female partner for your male primary? Why?
Love withers under constraint; its very essence is liberty. It is compatible neither with envy, jealousy or fear. It is there most pure, perfect and unlimited when its votaries live in confidence, equality and unreserve. -- Shelley
Mags, F, 60, poly-dating, loving and living with
miss pixi, F, 38
Punk, 41, M
Old Friend, gender fluid
Nick, 35, M (occasional lover)