>>37597777A mother having sex with a guy the same age as her son (or younger) is pretty much cucking him as she's closer from that guy than she'll ever be from her son.
No good mother would do that, and a son has every right to be mad at his mom if she does (even when both are adults).
Young men are in constant competition with each others, and a mother shouldn't give to one of her son's rivals a kond of love she'll never give to her own son.
But for daughters, it's pretty different.
Girls are in competition with other girls, not with guys. You'll notice that a girl will be much more butthurt if her dad fucks a young girl than if her mom fucks a young dude.