QKAT comes, hes in trouble, spade come, hes in trouble, and other cards might just give them the two pairs and he still don't know where he's at(its what hapened this hand). I think i would:

#1 raise this pre flop to around 1.50...you don't want bilions callers with JJ
#2 pot sized bet this flop and see what happens.

Jandje is almost playing his overpair like i would play a low pocket pair for set value except with a weird call on the flop.