A long strand of hair in 2M old's poop

Api

Today I found a long hair in my baby girls poop. It came directly out of her butthole. It's killing me thinking HOW!!!! I have pixie cut. However my MIL has pretty long hair. But my baby wears mittens most of the time. How could she possibly swallow it. Its freaking me out. Could you please help me introspect better? Anyone with such experience??

TIA