seriously? even if the only people she was with b4 we got her was the husband, wife, and a toddler? no one else? no other dog? She was even like that when we first introduced ourselves to her, and when we introduced her to our 5YO dog.
Without knowing your dogs background it's impossible to tell if her less-than-desirable temperament is due to nature (genetics) or nurture (her up bringing).
Even if it's not genetic it IS something she can pass along to the puppies.
The bitch plays a HUGE part in the upbringing of the puppies. Her actions are what the puppies see and start to imitate.
If Mom acts scared when a stranger approaches then the pups will, too.
I fostered a small mixed-breed dog for a rescue group (years ago). The bitch was as sweet as pie to my DH, myself and our pack - until she started to give birth. As each pup was born she became more protective. By the time the last pup was born we couldn't even come within 5 feet of the whelping box.
We weren't able to handle the pups for almost 10 days. Mom ate, slept, peed and pooped in the room she was in. We were finally able to make a lasso from a leash, toss it over her head and drag her out of the box - literally - so we could check the pups and clean up the room.
Every time we had to take her out of the room it was the same routine. She would jump in the whelping box and crouch over the pups, growling and snarling at us. We would lasso her and as soon as she was outside she was happy and friendly to us.
The problem was her reactions were already impacting the puppies. We weaned them a week early just to get them away from her but it was too late. The pups were afraid of people and terrified of our dogs.
It took alot of work to get them to the point where they were adoptable and I found out later than one of them was returned to the rescue due to temperament and had to be put down.
I would never breed a bitch that didn't have a rock-solid, 100% awesome temperament.