The only thing I can respond to now is the gift. If your kids want to buy mom a gift. Help them pick out a kid appropriate gift. Like a rainbow PLASTIC necklace. Something that a kid obviously picked out. Or have them make candy necklaces or buy a kit they can create a necklace with. I certainly would not buy a fine piece of jewelry for your wife at this time.
Me: 42 H: 43 Twins age 5 Physically Separated 7/2015