I have family like this. For example anything you say is analysed and then any mistake you make is then used against you later on. And it's usually brought out in front of people to make you look stupid and feel embarassed. But then the person retracts everything by saying 'I was just saying!' Or 'but it's true!'.
Why the need to do this to people though? Surely it's better to cover faults and mistakes rather than actively seeking to make a person look stupid? Sorry if nobody has a clue what I'm on about, I just needed a rant.