If she’s like me, she doesn’t wear it because of her son Trig (I’ve got twins his age, and after scratching my son, off went the ring except for super special occasions).
Re the missing ring: when weather is cold, and it has to be cold to be snowing like that, fingers tend to shrink and rings can fall off. I nearly lost a family heirloom ring that way and it was 58 degrees outside. That could be the reason for ‘no ring.’
In warmer temps, forget the ring as I can’t get it ONTO my swollen finger.
But what difference does it make? I know plenty of other happily married women who rarely wear a ring of any kind — do all men wear wedding rings? NO!