You asked for screenshots. I can show you multiple children of the same mother, with different dads. (This is partly because I roleplay her and her brother as trying to start a new race of their own genes, but the real reason is because I like playing with sim genetics to see what kind of children I get from different parental combinations. lol )
Here's the mother. (You can see her 4 youngest children down at the bottom.)
https://i.imgur.com/43P6h2f.png
I'll follow it up with photos of the kids and their dads, to make comparisons of the kids to their dads.
