Laenor was not the father

Yes, because an olive skinned mixed race men could not produce White looking sons who are 75% White.

Have you ever seen 75% White people? The vast majority do not look like they have Black ancestry. They might look Southern European or have some degree of ethnic ambiguity on that end but hardly can you point out their exact heritage.

I can give you several examples starting at the pale ginger children of prince Harry and ending with a portitst of Alexander Pushkin’s(father of Russia ligature) very White mother.

There’s a vast amount of genetic difference between having a Black parent and 1/4 of your grandparents being a Black person.

It is far less likely that Daemon and Laena's would produce a child that looked like Baela’s actress than Laenor’s actor having White looking children with Laena’s actress so I guess it’s obvious Laena was unfaithful as well.