pp 30-60 four bet turn bluff???

[obi---one]

i have no notes just basic reads. i am in the bb with a5 of clubs. two of the button openraises and i call. the flop comes 346. i check and he bets. my plan is to make the hand or attempt to take the pot away on the turn. the turn is a delicious 6 or diamonds putting two diamonds on the board. i bet and he auto-three bets. i looked deep into his soul and clicked raise. am i spewing chips or is this a reasonable play. btw, i think my table image is of a tight and reasonable player.