Can't help but to think the married lover is quite egoistic. She uses the other girl to have fluffy sex but still married that man who seems pretty useless...
Considering the possibility, or better the lack thereof, as well as the societal pressures faced by lesbian couples in Japan regarding artificial insemination, combined with the missing proper legal status for same-sex couples, I can imagine that women who desperately want a child will indeed compromise to a certain extent to make that wish come true. Many authors more or less directly address this phenomenon, in my mind often writing stories that hit home due to them sadly being pretty realistic (think Yui7's "Spring Haze: The Path We Walk On" or Amano Shuninta's "Mama Mama"). Not quite as light and fluffy as one might want, but I find many of said tales all the more heart-warming because of the way in which they depict people coping with what is far from an ideal situation.
Even in countries where we have full rights: marriage, adoption, artificial insemination; you will find lesbians being married to men and with kids, doing other women outside there marriage.
Some women just want to stay in the closet, so they can virtually enjoy the life of pretending being heterosexual in society. To lie, to use, to betray are for some survival acts.
I witnessed the mess coming from those kind of people, how they doomed their family and others in their selfishness.
That's why I think that, in a country where there is no death penalty for homosexuality, if the woman you are in love with is weak enough to deny everything that you are in order to protect her dome of lies, then dump her. Dump her and move on.
Is there gonna be LesbianSOLO! 3? Would love to read it!