Sounds like it could be hormones.
Additionally, when rabbits get older and more comfortable with their environment, they naturally become less dependent and clingy to you, so her newfound independence doesn’t need to be seen as a bad thing! At about 7mo, Wick started to begin a new behavior where while he’s being pet, he decides he doesn’t want it anymore, so he gets up, stretches, hops a few feet, then plops down somewhere else. So it’s not a cold-shoulder, just simply “I want my space now.”
Being taken care of consistently by a different person may cause this as well, because as lovely as your grandma may be, she’s not you— hence, she may have interacted with and cared for Molly differently, causing her to be less inviting to those close human interactions.
Give it some adjustment time. If she’s not relaxing as usual in a few days, re-evaluate her eating, pooping, urinating, and relaxation habits, as it could be a medical issue making her uncomfortable.
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.