1pm Aria mtt with very soft field. 100 runners, 10k starting stack w 30 min lvls. Up to this point I was playing very solid, had played 7-8 hands total and not lost one so far, making good size bets and smashing flops, showing down over pairs and flopped sets. I had a great image. 

We come back from 1st break and I have 16,500 at 100/200 25. 

Villian is a 6'5 300lbs black woman who played horrible and limp folded a lot, I had seen her limp with a ton of Ace rag hands, and even hands like Q6o playing them passive on all streets.

Villian limps UTG w 10k behind

I'm UTG+2 and raise to 800 w QsQc & 15,700 behind

I get two calls from MP and cutoff who have 7-8k behind

Flop 10c 7h 4s, UTG lady shoves 10k fairly quickly. 

Usually in this spot I iso shove almost automatically, or if stacks are right and other villians bad enough just flat hoping they shove, but is there any reason to think villian has me beat here? I feel like villian has A10-K10, 89, 56, maybe even sometimes JJ, 99, 88?

It's strange as passive as this lady is she open shoves, but I feel like I'm too far ahead of her range and how bad she is makes it hard for me to find a fold.