In order to stretch some privacy across the board here, I write with (obviously) fake names for each person involved in this experience, except myself. To cut out some of the guesswork, here is a list of the names with descriptions of who they are, if needed.
My son, whom I relinquished in adoption.
No explanation needed.
My ex-husband, who I am divorced from for several years
The Kiddo’s biological father.
The Adoptive Parents
Again, self explanatory.
My second son whom I parent
My daughter, my youngest child whom I also parent