Most unusual accident ever

My wife and I had just finished dinner, and our kids (Maggie, 4; Jackie, 6) were still sitting at the table; James (2) was in his highchair. We walked into the kitchen and were talking when Maggie walked in and started this bizarre exchange:

Maggie [walking into kitchen from dining room]: “Mommy, Jackie just licked Jamie’s foot.”

Mommy [talking to Maggie, but loud enough for Jackie to hear]: “Yuck. Why would Jackie lick Jamie’s foot?”

Jackie [yelling her explanation from the dining room]: “ACCIDENTALLY!”