And it happened a number of times already. I mean, amongst us siblings, it happened one time too many I lost count! And now it happens from time to time with the sister-in-law. Not big blowouts but petty stuff because you see each other every day, interact, so you will see the little things that differentiate her from the rest of the family.
Anyway, I am not writing this down to tell everyone that I have a bad SIL. In fact, I have a better one than you. I just hope it stays that way for years and years to come.
By the way, it's her birthday today.
Happy birthday, SIL!