Live 20/40 game at borgata with dead kings

[rubixxcube]

Howmany, she knows the bring in is 5.

Seems like the decision is split.
Results for those interested.

I 3 bet all behind fold. CG folds. OM calls.
4th and 5th we both blank off, he checks both streets to me and i bet both.
6th street he makes open 7's(his 5th street card was a 7 as well) but he still checks to me so i check behind.
He checks river dark as well?!?!

I plan on betting river improved checking unimproved as he won't call with worse if i bet. I catch an A on the river and check behind.

He shows 10's and 7's and takes it down.

Edited to add: I asked CG later what she had that hand and she told me she had 88 in the hole.