(NL50-100) Folding KK PF?

[dsw]

Hi,

just had a discussion with my brother and id like to hear some other opinions on that.

Hero and Villan are both TAG regulars. Youve never seen Villan 3bet PF with anything less then KK or getting out of line in general.
Both with a full stack.(NL50-100)

Villan raise to 4 BB. Hero raise to 12 BB. Villan raise to 36BB. Hero ?

I put him on AA,KK maybe 5-10% bluff.
Made that laydown 3-4 times now. Am I a nit?