For goodness sake, she is pregnant, not ill.
Why can't she continue doing her fitness classes (knee permitting). She's even been discouraged from swimming which is ideal in pregnancy.
Why can't she work up until 2 weeks before the birth? Plenty of people do and those that don't often work harder when at home than they would have done at work anyway.
Having said that, I don't dispute she has eating issues which need resolving.