I'm not supposed to do anything for Mother's Day for my MIL, am I?

If we lived closer and all got together on Mother's Day, I might say something to her. But it would feel weird if I called her out of the blue, since mostly we just text! Or more specifically, I text her pics and videos of the kids and she writes back now and then.

Do you say (or do) something for your MIL on Mother's Day?