Can I block someone from inviting me to Facebook groups?

I don't want to completely block her, just keep her from inviting me to groups. My husband's aunt keeps inviting me to all these different Facebook groups/pages/events that I have no interest in joining/liking. I will decline the invite and then a couple days later she will invite me to that same group again.

It's driving me crazy, but I don't really feel like saying anything to her.