Changes in behavior

My 6, almost 7 year old Shiba Inu typically tends to be independent. She values her personal space and I often find her in the other room by herself. This past weekend, she has been sitting in my lap, which is unheard of. If I get up, she follows me, whether it’s to the bathroom or the kitchen. Right now I’m lying in bed and she’s cuddled up against my back. I certainly don’t mind it, but I’m a bit concerned about the change in behavior. Has this happened to anyone else’s Shiba and should I be worried?