Happier version of your story:
My dad an I both did 23 and Me. He made sure I knew he had done sperm donation before I met my mother just in case something came up. Well, it did! I have two half siblings from his donations! I think it’s cool, and I think he’s happy to know he helped two families have a child.
I have a lot of half-siblings. One set of two, one set of 3 (I’ve only met the oldest), one only child, there’s me and my two full siblings, and the donor’s actual child. There’s more out there. Another we matched with their child, but I don’t think we even know their name. Been pretty cool meeting all of them and the donor. Its actually been a happy experience, but one certain people had no choice in making.