I'm surprised everyone thinks Dro is either flat out lying about being in an open marriage or breaking established rules. My suspicion is that he is telling the truth, and that he currently doesn't think he's doing anything wrong. However, I think when his wife finds out, she's going to lay down the hammer, and Molly is going to be left out in the cold, hurt and confused. I don't think she's done anything wrong technically, but I agree it was a bad idea for her personally, both because she does care about Dro, and is looking for monogamy. I think she is going to be surprised when Dro cuts her out of his life at his wife's wishes.
My bf and I watch this together, and he went on a hilarious monologue watching this episode about how Daniel is for fucking (including lines like "no one has abs like that AND a big ass!) and Lawrence, now that he has his professional life together, is for marrying. I was just like...um, is there anything you want to tell me? Because he was super detailed about why someone should want to fuck Daniel, lol.