DH and I need advice on a very tricky situation, we have no idea what to do for the best so I thought I'd put it to you lovely lot to help us.
My dear FIL had an operation to remove a Kidney earlier this year, he had an active sarcoma and we were told the cancer had gone. On his 65th birthday he was taken into hospital with what we were told was an infection. He said he'd open his cards and eat his cake when he was home and well. 3 weeks later his cards and cake remain on the dining room table, it has transpired the cancer has spread rapidly and is terminal. 
Last week FIL was moved to a local hospice, we are all devastated as it has happened so quickly, especially after being told he was recovering. My dear MIL is so shocked with everything and hasn't left his side. Tomorrow is MIL's 65th birthday. Neither DH or I know what to do for the best.
I had considered taking her to a local carvery down the road, but she wont leave FIL for an hour. We didn't think taking flowers and a card into FIL's room was a good idea because he'd realise how long he's been in hospital and probably feel bad for missing MIL's birthday.
I'm leaning towards quietly wishing her a happy birthday and leaving it at that. No cards, no gifts.
Any thoughts?