AAT2ss

Pot 4bet would be to ~ 7$ so I guess its better to call this deep.

I think its good spot for leading the flop. There are some Qxxx that can get in alot of trouble by calling and you can make some random low flush draws fold their clean equity vs your hand. 4 is too low of a card and given the preflop action I believe only the CO is likely to have trips.
We also have a good relative position to do so because the preflop agressors will not be last to act with the SB behind.
What do you think?

We cant just fold OTT as played with the bd fd ofcourse when the flop got checked through.

OTR its pretty clear we dont lose to trips. So its boat or bluff and bluff-catching is good. Nice hand

Leading is fine, as 4 way it's really hard to get value anyway. Most likely chance is if BTN cbets, but it will be half-a-pot-and-done. When betting you might get calls from flush draws or people fold them. If someone calls or raises, then just go to showdown if unimproved.

With that sizing SB should have QQ or a bluff, and as river is total blank it's justified to bluff catch.

Note: try to leave the results from the hands, as they often affect how people comment them. Here it's quite natural to think "bluff catching is fine" when we can see it was a bluff.