TBH, I think you have all of that covered damn well in LoM on your own. Aside perhaps from art, just because higher-res eye-candy is always better, and animations can always be smoother and/or include more frames and transitions.
Surprised anybody branching out into porn would even consider firing an employee doing that on their own time even for a moment. Especially somebody with such a clearly established experience (and success, even if not financial) in it, but then again, people be people. NCCs have been questionable even way back when I did that kind of work, and I actually know somebody who racked in a nice settlement when his company sued him for breach of their NCC. He was working for them on an RTS, he made a turn-based strategy game in his own time, despite being in "state enforces NCC" jurisdiction the trial was going his way so hard he pretty much scored early retirement in the end (predatory business practices, heh). Of course <standard disclaimer about this not being legal advice etc>. Also, a lot of time has passed since so maybe things are different nowadays.
For mobile, probably better to go with porn Katie "match-3" version of it
Though, if this was my decision, I'd go with some kind of "porn manager" game relying on real life timers, with multiple microtransactions involved to unlock the "best" parts that otherwise would require hideous amount of grind to achieve. Impulse purchases are, as far as I'm aware from all my reading, the main driving force behind MTS purchases, and, sadly, this part of the market is already worth more then actual PC game sales, so...
Most people underestimate how huge of a business porn industry is.
Though whether or not you can dig into that piece of the pie with your own product is another matter. But I'd say that things like Wild Life or Subverse prove there's a lot of genuine interest to push those things into mainstream, and presumably enough people to actually legit pay for such games, too. One reason I've been keeping a close eye at Subverse, it's a fantastic case study.