Due to confidentiality, we may never know... but you got me thinking, assuming that both coupled actually did have a child, and assuming that the recipients both had M.H.'s sperm, those children would be biological half-siblings. Theorhetically, they could be back in court in 18 years trying to find out who their brother/sister is...hoping it's not their boyfriend/girlfriend - I know, odds are slim to none on that last one, but this whole situation raises SO many more questions than answers.
Even with slim odds it could happen. Think about all of the people you come into contact with and every once in while you find a connection. Artificial insemination has always given me the creeps. I feel horrible for people who cannot concieve, but the thought of children having annonymous DNA it's just not right. To purposely go in and donate sperm and eggs, then another person comes along and uses either of the two is just too weird. I know in the case of adoption it's along the same lines but I just view adoption differently.
That could happen anyway--one night stand, promiscuity, drunkenness. It's sad but there are thousands of children out there who aren't the child of who they think they are!
Unfortunately, unless children are born as a result of marital acts between monogamous, married parents who stay married, trouble often follows.