Wait a minute, did 18 really cheat on him?
Honestly, the series just needs to end. It's way over the hill
No, alot of Doujin/R34/Hentai artists love having Krillin get NTR'd for some insane reason despite DBS going way beyond showing that 18 loves Krillin.
It's primarily NTR/Cuckold(because that's what they really are) degenerates who consistently do that with happy pairings all the time because yeah.