nanny in need!

I've been a nanny for about 2 years now and have worked long term for 2 families and have had various babysitting/overnight jobs. Recently I was let go from one of the families since their children are now old enough to stay home alone and began working for a new family. The kids are a 3 year old boy and a 2 year old girl. The kids are great during the day and I love working for the family, but the kids turn into absolute monsters at night. I have never experienced such a hard time with a bedtime routine. The mom explained to me that bedtime consists of one book each, tuck in, and shut the door. The kids will literally jump off the walls while I am trying to read and pay no attention whatsoever. The younger one cries everytime I deny her bathroom requests because she is always taken to the bathroom before we even head to bed. They scream, throw toys, jump from bed to bed, and get the dog worked up and barking. It's especially stressful because their home is in an apartment complex with thin walls. I have worked with misbehaving children in the past and have been able to manage and create a bedtime routine for them but I am at an absolute loss, it has made me dread coming to work. I try to tire them out during the day and shut the tv off an hour before bed and end the day with a small motor activity like puzzles or coloring, which they are absolutely calm through. I cut out all sugary snacks and limit them to water or milk to drink. As soon as I shut their door they come running out. I've tried to simply walk them back to bed without paying attention to them and saying 'back to bed'. I've tried sitting outside of the door so I can take them directly back to bed, playing lullabies, sitting on the edge of the bed. I even sneak all the toys out of the room before they go to bed but there are toys stuffed in every cranny in the room. I try to stay consistent with how I put them to sleep for atleast a week but nothing is working. I feel bad having their dad come home from work and having to put them to bed himself. I've been told that they don't mind but both kids have school in the morning and should be asleep by 8, dad comes home at 9:30. I will try anything and take any advice!