Christmas Covid dilemma

How old is your youngest son? Surely he could have made himself a snack? Perhaps he hasn't got much of an appetite anyway?

I think your DiL might have offered to plate up a meal for her poorly BiL. How very uncaring.

Depends on how old your youngest son is I am presuming as your post said he came home for Christmas he is not a young child. In which case he would be absolutely fine looking after himself for a few hours.

Your DIL should have plated up a meal for him!

I don’t understand the use of the word dilemma in this context.
He tested positive so had to stay at home. Sytraightforward enough.
As he was well enough to travel home, and COVID is hardly serious these days, there was no need for anybody to stay home with him . Not as you were only going for lunch not the whole weekend!
Playing up a meal ? Really?

Plating
No wonder some husbands are (play at being) helpless if they are fussed over like this!

In these circumstances I would have gone for lunch.
I think it would have been nice to take him a plated meal home if he felt up to eating it.

There would have been no dilemma for me. I'd been in contact with someone who had covid. I wouldn't have gone to someone else's house in case I was carrying it there with me.

You DiL should have sent over plated meals for you and been pleased you were staying away! In her shoes, I would have been.

If I had been your dil I wouldn't have wanted any of you over for lunch!

As Gagajo said you had been in contact with Covid

If your son is 12 then you should have stayed with him ...if he's 22 then absolutely he can look out for for himsrlf

All I wanted when I had Covid was water.
And paracetamol.
And a warm bed.

Yes, I'm a bit confused by this. In DiL's place I would have said "Don't either of you come here, we don't want COVID." Christmas Day or not!

I would too, probably!

Although DH's consultant said today they are far more concerned about flu than Covid now.

I think it right that the youngest son stayed away from the group meal. Assuming he’s an adult, he’d be fine for a few hours on his own - he’d probably sleep anyway.

I am baffled as to why the DIL should have provided a lunch for him. Jabbot could have left a light lunch for him or his brother could have sent a meal for him or Jabbot could have asked to take some home for him.