[Yeri]

It's meant as a joke. As a wife who is worried about his health, although irrelevant in his current state, continues to pretend having a normal life.

Such sentence is very common in my (Belgian) entourage.

This is also why he adds he is smiling.

[jvzr]

Yeah, I totally missed the sarcastic tone. I just thought she was making the joke on his actual illness, not the possibility of having another illness due to wine abuse.