No one has mentioned pot holders. Quick, easy and useful.

I like to give table toppers, you don't have to guess how long their tables are and they are handy and pretty to have around :D:D:D

A set of pot holders and maybe micro oven bag to bake potatoes
in, made of matching material. Mug rug is good too. Does any one know what that family likes to do or what hobbies they do?

Mug rug with mug and assortment os teas.

I would definitely ask what the SIL favorite things are. What are her style choices, color choices? We have heard so many horror stories about people not liking quilted things in the wrong colors or styles that I am really hesitant to suggest these type of gifts without knowing they are wanted. You have an easy way to find out what this lady likes since she is an extended family member. Maybe she is crazy about Merlot wine or sunflowers or Swiss chocolates or John Grisham novels. Just ask and then act accordingly.

tablerunner's are always a big hit.