You have no idea what’s wrong with her! Personally I suspected Crohns / ulcerative colitis which would explain her low weight. If she’s had her colon removed you are talking weeks and weeks to recover. My mum blew up massively, had infections, problems adjusting digestion etc etc. but like I said, we don’t know what the problem is . She could have had a kidney transplant, anything.
I’ve worked in gastro, also have loads of IBD in the family. I also thought the POW may have had a colectomy/ ileostomy for IBD. However, I still think the positive updates from the palace do not fit with the expected recovery time. After 6 weeks, most people without complications, would be able to deal with an issue with one of the kids with the support of a nanny/housekeeper/driver/PA while their DH went down the road to a memorial service.
I’m not disputing that Catherine is not back to fitness, I’m saying that she was/is much more unwell than announced and that her recovery is stormier than the press releases indicate.