this thread right here is why I lay massive pipe to my fiancé, stay in the gym plus bjj, flip on her for no damn reason sometimes(just to remind her a nikka aint soft),
and make do random things to spoil her(so she feel appreciated but also so other broads will tell her how good she got it), cause it don't take much for a female to lose intrest in a man then start letting another dude grab hold of it.
Nothing wrong with improving ones lot in life while putting in the extra effort to keep your relationship healthy & strong, but having a false sense of security with any woman is dangerous because even with all your positive personal attributes & good deeds, it still won't completely prevent your fiancé or prospective wife from contemplating a affair or actually cheating on you in the future if she chooses to do so.