Pembroke Welsh Corgis

I have both male and female Pembroke Welsh Corgi that I have had since May. The female came into heat and so I was keeping her isolated from the male until she cycled out so that I could take her to get her fixed. Well, hubby came home from one of his trips and let the female out with the male and now we are going to have puppies around Mid November. I have had her isolated in my house while he stays outside along with my other two dogs until after she has her puppies as I read that the female can become over protective and needs to be in a stress free invironment until after they are born. My question is, when do I introduce the puppies to the father as well as the other dogs so that they will get use to being around other dogs and is there any possibilities of aggression from the father towards the puppies?