Yeah I wouldn't mind it, but a problem that has been raised because of how Lena is written is that she wouldn't push Holly like that. Even now as slutty as she can be, she is very protective of 'Holly's feelings'. The only circumstance I could see her pushing Holly to outright cheat is if she is on the drugs. In chapter 10 she could blow others at the club while dating Ian, so there is a history of Lena doing things she otherwise wouldn't while under the influence.
Holly making the choice to cheat would also be tough to write, in this chapter she told Lena that she loves Ian and there isn't really a way to give Holly bad sex at this point. If Eva were to write it, it would probably be after an argument. The most likely scenario would be Ian getting jealous/controlling over a maxed out holly_change Holly who acts/dresses super slutty. Them at the club Lena can push her to cheat.
I think this would still take so much time to write tho and we probably won't see this kind of route in the coming updates.