i just thought of this horrifyingly angsty plotbunny
i'm not going to use it because I write all my fic in the same universe and it doesn't work with what I've already written but feel free to steal it
so with Frank getting Abby pregnant while he's still training to be a doctor and Mel having to pay for med school AND whatever insurance doesn't cover for Becca's facility and no indication that either of them come from families that are/were particularly well off, both of them needed money at some point (and lbr probably still do)
so they (some years back) both donated genetic material. Frank did so when he realized how easily Abby got pregnant (protection failed so he thinks he has super sperm). he doesn't feel conflicted at all and Abby doesn't really care because she's not convinced that they're going to be around Pittsburgh forever (so she's not super worried about Tanner accidentally falling in love and reproducing with a genetic half-sister).
Mel, on the other hand, feels conflicted as fuck because she absolutely lied off her ass on the intake forms when she donated eggs. as far as the people at the fertility clinic know, both her parents died accidentally and Becca WORKS at an independent living facility rather than lives there. all the staff knows is that she has a family history of fraternal twins.
fast forward to the present. they're treating a single mom and her two children who have been badly injured in an accident. when they are undressing the mother, they notice that her body is slightly different and a blood test confirms she has Turner's Syndrome. many babies with Turner's Syndrome do not make it to birth alive, but those who do generally can live fairly normal lives (source: I know a woman with Turner's in her late thirties who is a doctor with two kids). unless the syndrome only affects some of their cells (a condition called mosaicism), a person affected with Turner's cannot conceive a child naturally because they go into premature menopause (my classmate with Turner's went into menopause at the age of eight, and she was lucky enough to end up being a WLW whose partner was willing to carry children). that said, the uterus in Turner's Syndrome patients tends to develop normally, so a patient COULD carry a child through either donor eggs or reciprocal IVF (donor sperm and an AFAB partner's eggs). the patient they are treating in this case used donor eggs and donor sperm... more specifically MEL'S eggs (because she was similar in looks to the patient) and FRANK's sperm (because the patient wanted the kids to at least have SOME chance of being tall).
so here Mel and Frank are treating two preschoolers that look like they could be theirs... because genetically they ARE...




















