as a relatively new dog owner who is learning more everyday, here is what I can suggest...
1. Get enrolled in a puppy class that is reputable and may even be through your veterinarian. Having an expert around is really really nice, especially someone that is willing to get to know both of your dogs as well as take the time to show you how is the best way to interact. It's more about us humans learning!
2. Spend time with the two of them. Learn about their personalities and bond with them so that the two of them can have time to bond with you.
3. Time will heal everything. If she is frustrated because of their accidents, suggest the crates (as previously mentioned). Once they are crate trained, I am sure that she will be much happier. However, they are puppies and they are always going to be creating something... when we got our first dog we kept a log book of when he went to the bathroom the first weeks or so. After a few days we had figured out his "on the 15 and 45" routine and housetraining became a lot easier. I am sure that you can pass along your expertise as well as letting her know that every dog owner has bags in every jacket pocket...
4. Walk them, play with them, interact with them, use toys! It is such a blessing to have a puppy in the house and I am sure that she will realize that her life has been enriched beyond anything that she could have imagined.
5. Take tons of photos. You forget once they are older how tiny they once were.
6. If you show her how to love them, I am sure that she will understand. You sound like a wonderful friend for helping her out and I hope both of her dogs lead long, fulfilling wonderful lives. Best of luck!