Not sure I agree with raising so much on the river, if at all. What I'm worried about here is a set. Mainly because it's how I used to play sets as a noob; call pf raise with pp, flop your set, don't bet into pf raiser on flop, flatcall until river, then raise big. I stopped doing that because it's a dead giveaway you're slowplaying your hand. I would say probably AQ though, in which case you're good, but also possible 99. Less likely are QQ, 8T, or a 7.