The shirt might be related or maybe not. I personally think mom saw her in it last and she changed while mom was asleep. Willow is a petite child and from my experience with my kids her clothes would be super tiny, too. Even doing a load on little kid laundry is a nightmare because a full load is like 1,000 pieces of tiny clothes...LOL. A shirt that size could easily get lost in bedding, a couch, etc. The reality is for many parents, myself included, is kids have a lot of clothes, they frequently change during the day, they leave clothing in random places, and it is really hard to keep organized and on top of laundry, etc. I can't judge the mom or others on that stuff.