EdgeIsDaddy
Eddie donated sperm to the sperm bank before he got married to Vicky. 25 years later a 45 year old woman, Diane, and her 46 year old husband, Richard, used his sperm with out knowing it (Obviously plus her husband couldn't have kids).
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15 years later, just before Eddie debuted his "daughter" was born, Ziva Bee.
Ziva went through life getting bullied for her parents being 30 years older than her, but she loved them like she always would have if they had been younger and closer to her age (Like 20-29).
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On Ziva's 15th birthday she found out that her dad was not her dad, she felt betrayed at first but then she realized that they used a sperm donor, she wanted to know who, but her parents didn't know, so she got a DNA test done.