Whilst it is unusual, to say the least, clearly social services thought them fit parents to adopt two children previously. Therefore I certainly don't think them attmepting to have a "biological" child is so far out. And whilst I'm still trying to work out whether being a transgendered female to male living with another transgendered female to male makes you gay, straight or bi sexual (and getting a headache in the process) I don't see it as any more problematic than any of those groups having children...i.e. not problematic at all. I would have thought the "long term effects" of being in a stable, loving family environment would be much more beneficial than remaining in the care-system.