Eye color is determined by genetics, and it is possible for a child to have a different eye color than their parents. The inheritance of eye color is a complex process involving multiple genes.
Blue eyes are typically considered a recessive trait, meaning that both parents must carry the gene for blue eyes for it to be expressed in their child. Brown eyes, on the other hand, are often considered a dominant trait.
If both of your parents have blue eyes, it is likely that they both carry the gene for blue eyes. However, they could also carry the genes for other eye colors, including brown. If they both carry the gene for brown eyes and both passed it on to you, it would explain why you have brown eyes even though your parents have blue eyes.
Eye color inheritance is not a straightforward one-to-one relationship, and it's entirely possible for two blue-eyed parents to have a child with brown eyes. It does not necessarily indicate any kind of infidelity or cheating.
In conclusion, your eye color is simply a result of the combination of genes you inherited from your parents, and it does not necessarily mean that your mom cheated on your dad. Genetics can sometimes lead to unexpected variations in physical traits among family members.