Interesting situation - TT vs. short stacker shove vs. LAG flat

Interesting situation where the pot becomes very bloated, pre-flop, due to a short stacker:

Full Tilt Poker $0.25/$0.50 No Limit Hold'em - 7 players - http://www.thehandconverter.com/hands/457384
The Official DeucesCracked.com Hand History Converter

UTG+1: $55.60
Hero (MP): $61.90
CO: $9.65
BTN: $9.75 - Short stacker with typical 10/8 range
SB: $10.25
BB: $75.25 - 41/28 over 100+ hands
UTG: $8.25

Pre Flop: ($0.75) Hero is MP with Ts Td - I'm going to break up the pre flop action so that it is easier to read:
2 folds, Hero raises to $1.75, 1 fold, BTN raises to $9.75 all in,
Am I ever folding TT vs. a short stack shover? Probably not. I'm good enough times here that I will show a profit over the long term to call a short stack shover.
1 fold, BB calls $9.25,
At this point, what can the BB be flatting for 20BBs? He is a LAG, so I'm thinking about his range in this spot: AK, AQ, [maybe] AJ (I tend to think that AK is going to re-raise though, because LAGs / donks are taught that AK is the nuts), and pocket pairs.

Hero raises to $20, BB calls $10.25
Here's my mistake though: With ~$20 in the pot, I raise another $10, offering him 3:1 for him to make his call. The question is: What should I be raising to? Should I be shoving here? I don't really want to shove because he's calling AK and [maybe] AQ, in which case we're 50/50 with the overlay of the short stacker's 20BBs.

I am reasonably sure that I can get away from the pot with 1/3 of my stack lost if I see an A or K hit the flop.

Flop: ($50.00) 7s 2d 6c (3 players - 1 is all in)
BB checks, Hero bets $20, BB folds
I want to shut down over card draws by making a "significant" cbet here. I think the size of the bet, not necessarily in relationship to the pot size, is the shocking / significant factor here. (I don't think your standard donks are thinking about bet sizing in relationship to pot size.) As a side note, I don't have a problem with this play: dry flop, a little less than half pot bet. Clearly, it's a committing bet where if he shoves, I am going to re-evaluate / call.

Turn: ($50.00) 6h (2 players - 1 is all in)

River: ($50.00) Ad (2 players - 1 is all in)

Final Pot: $50.00
Hero shows Ts Td (two pair, Tens and Sixes)
BTN shows 9h 9c (two pair, Nines and Sixes)
Hero wins $19.45
Hero wins $28.05
(Rake: $2.50)
In the end, I think I got pretty decent value out of a middle pair. I just haven't been in this situation too often, where a short stacker over shoves for (in ratio to the pot) an odd amount (20BBs when the raise was 3.5BBs), thus bloating the pot and screwing things up for stack-pot ratios.