Wasted effort

Very rude and thoughtless.

Oh apricot that's so hurtful, not to mention tactless and ill-mannered.

If they were coming for a meal it was appallingly rude to eat on the way. I would definitely not bother another time, tea and biscuits at most I think!

How, merlot???

I'd have made them eat it.

And in answer to your question, no, you were TOO reasonable.

I wonder if your granddaughter was embarrassed by her partner's rudeness? She may not have shown it in front of you. I would definitely not cook for them again, if they haven't eaten on another occasion, suggest they take you to the pub.

Had they known that you were going to be cooking a meal for them, apricot?

That is very rude of them.

Love your handle by the way !
A little ((HUG)) for you !

I think you were very restrained, apricot!
How inconsiderate of them.

I may well have said "bring your own sandwiches next time". I would not have allowed them to get away with what I call rudeness, knowing how much time, work, effort and money you had put into it.

That would have been the last meal I ever prepared for them unless I received a grovelling apology.

If they knew you were preparing lunch then I think they were down right rude!!
You are justified in being cross.