To be honest if they were acting out she should have addressed that at the time, whether it be with more training by her and her husband or from a specialist. Do they have the nursery set up and all the baby gear out? We have always found that having things in place way before the baby is the best route. It gives the dog time to "explore" and investigate the new things. Some of our friends with smaller dogs (we have always had large bully breed dogs) have carried dolls, even ones that cry around for a month or so prior to baby, again to get the dog accustomed to the noise and new member. Considering the babies are born, how long before they come home? If they still have some time I would encourage as many of the things mentioned ASAP. Of course little things like taking a blanket to the hospital and then bringing home so the dogs can smell it, is a good thing. Are the behaviors due to not enough exercise? aggression? bad behavior? If it's exercise, I would try to get a routine down that will be managable to maintain once the babies are home. Dogs like routine. If it's aggression I would suggest getting some training. Once they are home we always have me go in first to greet the dogs since they havent seen me in a few days. We then bring in the baby and let the dogs smell him and 'explore" him. We try to allow the dogs with us when we are with the baby so they are not excluded but we also make sure they have a "safe" place to go that is baby free. It's hard to give a lot of advice without knowing more details of the behavior though.