Exceptions exist

Women are like teenagers. Mostly adults, but full of weaknesses, hormones, and general madness that cause them to act in ridiculous ways. Much like teenagers still, with extremely proper parenting AND social circles (plus a chunk of luck from hereditary) they can be downright pleasant and good things instead of rebellious monsters.

And yet, like teenagers still, "falling in with a bad crowd" can undo all of it and that wonderful exception returns from college for Xmas break a whole new monster.

Point of this is, exceptions are made (and rarely born), but they are still women at heart. Capable of the same failings and one must never grow too comfortable in that regard. You can live a long and happy life with her never failing you as such, but that growing comfort is often how that path to ruin starts.

*For the record, this isn't an attack on you or your wife. Much happiness to your family. Only a perspective on how everyone thinks theirs is the exception and many end up wrong for it because of that thought, man or woman (how many think they are with the one super hot muscle tat guy who isn't a violent felon in the making?). A mistake I made and only with luck didn't end up ruined for it.