Shocking or expected, it actually appears that the majority of kids in homosexual households are from previous relationships.
Is sexuality immutable? It would appear that this piece of data suggests “no.”
There is strong anecdotal evidence, that many lesbian mothers had their children the old fashioned way, before they realized they were lesbian. Some even were married to men before they became enlightened about their “sexual orientation.”
The liberal explanation for such cases, is that society compelled them to conform to “heteronormative” standards, and that’s why some lesbians were apparently heterosexual before they became enlightened.