Colour prompt here!

'Green'

Now this one can go a lot of ways

Are they sick?
Will it be a sick fic with A nursing B back to health?
Is it morning sickness?
Both get food poisoning?

Or is it envy?
A broke up with B and is now in another relationship and B is jealous?
Mutual pinning after a bad breakup?
A gets jealous when someone flirts with B?

This is interesting because there are so many directions it can take. I hope this one gets your juices flowing.

Eww.