My apologies for getting @Tiggy’s gender wrong! I’m obviously just a sexist pig who can’t conceive of ladies playing poker 
@1Warlock, many thanks for your advice. I know that I’m too conservative against a shove but I really needed this sort of discussion to bring it out in the open and decide to plug that leak! In my defense, it is only the habitual limpers that concern me. I’m reasonably comfortable with “normal” maniacs who open big, c-bet bigger and then shove.
I like your line of thought of including 6x and 7x in villains calling range. Those hands are probably within a limping range for, I expect, most people but I didn’t consider calling with them. I think that I don’t give limpers a wide enough calling range which feeds into the “dread” I feel when I’m bet into etc.
Question: Why wouldn’t a habitual limper just call a raise holding JJ+ or QJ+? The “habitual limping” part of it leads me to believe that she’s just not an aggressive player so calling rather than 3 betting makes sense to me. I’ve got a mate that does exactly this - he’ll limp nearly any 2 cards and call up to 10BB with anything playable. He’ll very rarely raise or 3 bet preflop.
My revised thoughts are: I think she hit on the flop or she’s holding a big pair. Going with your thoughts, @1Warlock, that the lead on the flop was a probe, she got her answer! OP probably doesn’t have the nuts but is comfortable with the flop cards.
Question: why would OP just call on the flop holding a set or top pair? Are the odds good enough to 3 bet big and try to take the pot immediately?
A king on the turn? If it hasn’t helped her hand, she has to know that it very easily could have helped @aoeu. I think it’d be a big move to shove with a small pair or less and hope for the best! If she did do that, she deserves to win the pot!
So, my new range for @Tiggy is: 2 pair+, JJ+. She must know that, if she’s not blocking, sets and high 2 pair are very realistic for @aoeu to hold here. So I think she’s confident that she’s already beaten any single pair giving her a revised range of 2 pair+, KK+.
I don’t know anything about MDF so I have to accept @WannabeCoder’s suggestion that any 2 pair would be good here. I’m not comfortable with that, to be honest, but that’s obviously a lack of knowledge on my part.
In my ignorance, I’d only be calling two pair with queens or kings. Calling with 666 is a coin flip for me but I’d happily go in with 777.
Question: I’m not familiar with “exploitative folds”. Is there a thread here or somewhere else that I can find out more?
Regards
TA