It's optional, you can refuse (which will lock you out of the femdom ending as well).
Hi,
I know the lesbian ending was the least popular back when you ran your poll but will you eventually be making it for the sake of completeness. The dynamic you guys made between the wives had great potential so I hope you'll eventually do it because I think it'll turn out better than people expected. Just strikes me as a wasted opportunity otherwise as, when you have a game this good, it may as well try to fulfill the potential that all the hard work that went into managed to achieve - few games are actually in such a position.
Looking forward to your future works.