The adoption notification issue aside, it's kinda weird that Stacey refers to the birth mom and her new daughter as "family friends" when the birth mom is the ex-husband's niece. If they are keeping the status quo in regards to telling the daughters, then the birth mother would be their cousin I think. So why not just call her that? And Stacey's ex-husband seems weirdly out of the picture from the letter. Weird because the letter says they both adopted the girls, so he would be their father still.

I feel like there's something else that hasn't been said here.