I'm sorry but I agree with the above too. I would like to commend you for asking the question, not alot of people would bother.
Temperament is above all one of the highest factors when breeding. One of my friends said to me that when prospective new owners met my bitch that they would want one of her puppies, because she has such a lovely nature

Naturally I would never have bred from her unless her temperament was 100% bombproof.
I suppose you also have to ask yourself your reasons for breeding. If it's for showing then you can buy a puppy from a reputable breeder, be prepared to go on a waiting list.
From what you've said you really could haev a potential nightmare on your hands as bitches can be VERY protective over their litter, some more than others. If this was the case, based on what you've already said this really could send her over the edge when prospective puppy owners come to see puppies.