Your MC+JB+Elena is interesting to me. I love to see it honestly, to see how people react to it. Elena have never shown interest (i dont count the booze/raaaawr) thats just crazy party shit. Shes been nothing but cordial with Tremolo and expressed deep love to JB the entire time. MC cannot do suggestive stuff to her or try to sway her or show interest (raaawr might possibly be the first). There shouldnt be an emotional attachment there but what do I know? Have people gone more nuts in the last few years? I personally like that there are canonical young women that are not conquests but actual friends to MC in the story. Makes it more immersive and better story. However Elena+JB seems like a couple that maybe would entertain a third wheel so it wouldn't feel too out of place if it was an option though, and Elena is really hot after all.
I suspect people would not take well to it though. Some of you guys deeply underestimate the weakness in the anti NTR people. DPC would probably have to start treat Elena and JB differently too to not rile people up that NOW want Elena for themselves. As Darkdevil said, Bella have never really been show to express love to her actual husband at the time. Imagined couple status can be cheated/betrayed on. NTR does not care about the physical status of people being together or not. All thats required is the emotional connection people (the players) have with the MC to be betrayed/cheated/taken/take-your-pick, by the character(s) being with another male(s). Thats literally ALL it takes for something to be NTR. Thats all it takes in hentai, theres NTR hentai where the virgin beta looks from afar and dreams of being in a relationship with the class beauty, while shes getting hatefucked by the bully and (soon) his goons.
Damn, I really want this episode out now. Oh Lily, why did you have to be in a vampire outfit. My weak point. Depending on how that scene pans out she will rise a spot or two on my personal hotness list.
I have to agree with you that Elena is hot. There is something about her. But Elena has already shown interest in the MC, just not as obvious. It's the little things.
For example, during the HOT party of EP7. Right at the beginning, Elena tells Jacob and the MC to be good and not to fight. Jacob immediately says he's not fighting and Elena replies that she didn't mean Jacob. All that comes from the MC is a "hey." Then Elena grins at the MC. This is very subtle teasing. Elena teases the MC in the same way when he is exploring the mansion and she is naked in bed with JB. What loves each other, teases each other. In this scene, Elena demonstratively bows very low to the MC. Elena is interested in the MC and JB will know that. JB already mentions in EP5 that he and Elena actually tell each other everything. Yes, I know, so Elena didn't tell JB about the preps party. That's why I wrote "actually."
In EP2, we learn from Jacob that Elena is a nymphomaniac. I assume so Elena and JB can distinguish between love and sex. Also, Elena is the dominant person in the relationship, not JB.
The only problem for a MMF with Elena will be if the LI's would tolerate it or if it will only be possible in the Others Girls Branch. However, I can well imagine that there will be swingers parties in later EP's that Elena and JB will definitely attend.
-Jill will not tolerate such parties.
-Isabella and Sage might be there. Isabella because she already mentioned MMF in her spin-off from EP4, and Sage is certainly open to such things.
-Josy is a bit of a nympho. She got really horny when she saw the first three-way sex of Maya and the MC. So I think Josy would also have no problem swinging if the love between the MC and Maya is safe.
- Maya is a shaky candidate. She is just discovering her desire for sex. In EP5's Hangout, Maya says that all three should try each other out before committing, and in EP6, Josy says of Maya that she used to be more adventurous. In EP4, the MC questioningly mentions that Maya is more malleable than Derek imagines. However, the same is true for her. Maya must be sure of Josy's and the MC's love.