Grief Distraction Sisters and Mom Christmas Trip

Hi Y'all!

My father in law passed away suddenly last week. Me, my wife, and my sister in law are looking into booking a trip for my mother in law somewhere fun and distracting for this Christmas to help her through the first Christmas without her husband. She's a huge anglophile and loves the UK, but she took a couples trip with him to the UK a few years ago and we're thinking that would be too fresh and too much of a grief reminder. So, as a family, we're all professionals in our own careers in healthcare and are currently without kids. So we're thinking $3000 per person and we as the daughters would pay for my mother in law. We're thinking an all inclusive somewhere warm (as we live in Michigan and Oregon) but have no idea where to go.

As we want this to be the most fun, and distracting, for my mother in law, here is a bit about her. She's a retired teacher, and loves kids, but likes her own space, so maybe an adults only resort. Also, she's a big history nerd, so would love to be somewhere historical or that has great historical type places to visit. She's a huge foodie, and loves trying new things, so having great food around would be ideal. She's also an avid reader and loves nature.

TLDR: My father in law passed away recently and we're looking for reccomendations for a place to travel with all inclusives somewhere warm to take my mother in law this Christmas as a distraction/family centered trip of all adults. $3000pp is our budget and a week would be ideal!