Ok, so I'm waiting at the drive-thru pick-up window of a McDonald's in Pittsburgh, and a girl and boy walk inside. The girl, ~ 12-13 yrs old, the boy appeared to be ~14 yrs old but they exited a car parked in the lot ~100' from me ... possible he wasn't driving (passengers?) but probably was so that puts him at least 16 yrs old .. he certainly did not appear as older than that. Girl ~ 4'8" - 4"10, boy ~ 5'3".
The girl appeared happy, very talkative, at times in the boy's face talking and smile/laughing .. and she was wearing a black hat, fedora-style without a band and without a top-crease. Blue short-sleeve pull-over, black shorts.
I just re-watched the video of LB playing at a friend's house .. the wider-set eyes, hair color, boisterousness were the same .. face / eyes very very close but I'm not 100% sure ...... arrrrggghh.
I was this <- -> close to placing a call .. but I didn't. In Pittsburgh? Doesn't make sense.
I am not aware of possible relatives in the Pittsburgh area.