So, My Mother-in-law partook of the emblems last night at the Memorial...?

She has been acting a lot more zealous for the past 6 months or so. (both in the ministry and in day to day life) For instance on a visit to our house she pulled out the Bible and just read to us. My husband, his sister, and I have been joking that she's acting like a religious fanatic, but didn't know why. My SIL finally came out and asked her, and apparently my MIL explained why. But she never told me or my husband. We went to the memorial, and all was good. We're in different congregations. Today, I received a call from a friend of mine saying that my MIL partook of the emblems! She still hasn't talked to us about it. We've all been active and involved both in the truth and each others lives for a long time. We've always had a good relationship with her. I feel like someone socked me in the gut. Why would she allow us to find out like this? How would y'all feel if you were in my place. I've prayed for a calm heart.