How do you know that they are "expecting" a quilt? Do they actually hit you up for it or for a commitment?
When someone gets demanding with me, I tell them to get in line, and I use a tone that conveys that they should not hold their breath.
It also helps to have the occasional drama moment and lament how busy you are with these projects you committed to and that you will need to scale back and do some fun things. They will get the message.