It's worth remembering that Dan is enjoying what's going on and hasn't used his safe word, the problem will be when he uses the safe word and Sarah won't stop ignoring it. Now it's hard to put the blame solely on Sarah, since it was her husband who dragged her into this hole. It'll be worse if Lester forces him to turn into Sussy (as he feared). You want me to fuck you, Sarah? Tell Dan to dress up as a woman and use the cage. It could gradually be the cage first, after a while Lester would let him, Sarah would go crazy and make her demand, Dan would dress up as a woman and Sarah would ask her husband to do it for her, Dan would look at her face of desire and frustration that Lester wouldn't let her touch his penis unless Dan dressed up as a woman. After Dan gets dressed, the past humiliation begins, Sarah says she loves Lester and humiliates her husband a lot, he cries and says the safe word and she doesn't stop. Lester and Sarah continue to caress and humiliate Dan. At first it could have been an RPG. Lester has strategy as an ally (and a path that can be followed).