IMO, no, you don't have another talk. You've talked plenty. And flip-flopped too many times already, too.
From my read of your sitch, it's time to put fear aside and show H through ACTIONS - not words - that you won't play this game anymore.
If living in an open marriage is not something you wish to do, then don't live in an open marriage. Bow out. Let OW meet all your H's needs. Meanwhile, don't stay in that triangle; you're the only one who will be hurt for doing so. The less you know about their relationship, the better you will be able to emotionally distance yourself from your H and the hurt he is causing you.
GAL and stay mysterious ... not to get a reaction out of H, but because it's the best gift you can give YOURSELF right now, at a time when it feels you're otherwise being ganged-up on.
Chin up, buttercup.
M: 40 H: 44 Married 14 years S11 & D6; D20 & D19 from previous M 2BDs/PAs, 8 years apart Piecing: April 2014
