Let’s also add the following. Presumably, one of these women is her biological mother while the other is a mere same-gender partner. This daughter may never get to know even the identity of her own father, much less ever see him and, by extension, what a father and husband should be, as his identity could be contractually or lawfully protected as a “fertility” donor or the like.
Not to mention that the women may choose to never reveal to her who is her real father, as the women may wish to (fool themselves and think they) demonstrate that a pair of two women is just as good or better than a pair consisting of one man and one woman.
You cannot compare the pain of an absentee father (or mother) to this. A normal step-father (or step-mother) is heaven in comparison to this. Do you not see even an inkling of the utter disaster that is this toeiva marriage?