I think I'd be calling down here. I discount all full houses because why would they over bet that, they'd bet a smaller amount to get you to call, it could be someone playing QQ-AA stupidly.

I'd go ahead and call the turn and most rivers.

Folding turn looks premature, but as a self confessed nit if he shoves the river I would find a fold. I don't expect villain to be trying to stack an overpair on a paired board knowing you have plenty of Jx in your range. We're really hoping he's badly playing J9s but that's a long stretch; just too many combos of better Jx that willplay this way.