Congratulations! I think it's healthy to stay busy and hope she can do what she loves, even if it it seems hectic. I know there are exceptions, but the ones that sit at home are the ones who've wasted it, IMHO.
My grandmother raised 5 brothers alone, owned a company, and dreamed of her chance to travel. She retired the day she had a stroke. She's still kicking and still an inspiration, but I think of her often when choosing to spend time today traveling and enjoying this great nation.
I wish all of those retired the best!