Think creative, nj is poisoning children and she needs the children more than the children needs her.
Read up on postpartum psychosis.
Get a cat, get a hamster, get a little gold fish aquarium,
then if all these wear off, put out the big guns, get a puppy!
Tell them that you have new stickers for them to decorate their rooms/beds,
Make it a ritualistic affair to go to Target and get theme bedding for them.
Heck, get some theme PJs too while you are at it.
You want to distract the children from the crap that NJ loads up in their simple heads.
While they are at yours play board games, play catch with a soft ball, play hide/seek.
Again pull out the bigs guns like bubble machines etc once in a while
Remember, the main strategy is to rile up their emotions, and tell them what great time they will have and the fun stuff they will do.
Stuff like "I am excited to see you guys and play WII or play UNO", "I got a new Crazy Kake Mix, I can't wait to bake it with you guys"
Also, you need to downplay Ds anxiety like "Sure, if you miss mama we will figure something out"
“A woman worries about the future until she gets a husband, while a man never worries about the future until he gets a wife.”