Mysterious Thong Panties Saga

These are the mysterious thong panties that showed up in my laundry. I do not wear thongs and I live with 2 boys, a boyfriend, 2 dogs, and 2 cats and I'm fairly certain that none of them own, much less wear size 6 thongs. Of course everyone feigned the 'deer in the headlight' look when I asked who they belong to.

As you can see, by looking at the 2nd photo....these panties clearly do not belong to Bernie.