So your partners are Doms and you're a switch? There isn't an actual Master/Mistress--slave power exchange 24/7 thing going on?
This is just for kink/sex play time and not a full on lifestyle commitment with your daily chores,expectations and routines set for you?
If so, I don't see a problem. You could have kinky sex with him, or with her, separately, and there'd be no need for them to cooperate. If they do want to Top you together, it would be up to them to plan ahead, or coordinate on the fly. They'd need to have very good communication skills as metamours to do that.
Since you're a switch, do you also have lovers who allow you to be on Top? I'm a switch too... I'd get frustrated living with 2 Doms 24/7.
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
me: Mags, 59, living with:
miss pixi, 37