Bike 20/40 - LRR Sanity Check

Older Asian woman who usually plays 60 and has a clue limps UTG. This is the first time I’ve ever seen her open limp in over a year of playing with her. SB calls and I raise KTs in the BB. UTG now limp reraises. I’ve never seen her do this and I suspect her range consists of AA and potentially some weird other stuff. SB and I both call.

Flop QJ2. I check, she bets, SB folds, I call.
Turn 4. I check/call.
River K. I check, she bets. I have no idea what I beat but I’ve come this far and decide I can’t fold.