50NL Bovada 6-Max

100bb Eff
Hero raise T9ss CO $1.50
Bttn raise to $4.50 (2nd 3b from these positions in an orbit)
SB cold calls
Hero calls

Flop Kd6sTd
Button c-bets $7.50 into $14
SB folds
Hero calls
Turn 8c
Hero checks
Bttn bets $14 into $28
Hero?

When villain bets flop 3-way, imagine this eliminates some of his air combos like A3hh for example. I wonder how it affects things like AJo/AQo having the cold caller in there pre, and if some of these hands end up being flatted preflop. In a heads up scenario, I think this should make it into a turn calling range given we have some equity and villain can certainly have enough two barrels. I can see this being a bit closer if the flop gets bet at a much lower frequency however. Also, any idea what the half pot sizing may indicate?