I think this open marriage Victor & Nikki claim to have is such a joke. First of all, there is no room for jealousy and Nikki is clearly jealous of Helen. It wasn't that long ago she was pushing Ashley toward Victor (which made no sense) but now she is pulling that haughty act with Victor's mistress and reminding her SHE will always be the love of Victor's life. Victor, on the other hand wants to know who it is Nikki is keeping company with and I don't think he is going to let that go. He's much too possessive to be in an "agreement" with Nikki.
What is really quite unimaginable is Victor inviting his lady friend to (A) take him home from the hospital & (B) inviting her to stay for dinner. I have never had an open marriage but I would think it blurs the lines when you start entertaining your respective lovers in the home you share with your partner. Unless of course, they are about to enter the menage a trois arena. Oh, please, no. This also throws "discretion" out the window.
At any rate, is this just an elaborate ruse to bring Victor & Nikki back to one another? None of it makes sense & it seems like that could have been accomplished with Victor's near death experience. I, for one, will be glad when this is all over.