I felt a little bad as I was the one who bought her the Port - under the assumption that dementia probably isn't much fun, and a little of what you like does you good. We mostly got her cat-calendars and ornaments from that point on.
One of the best things I did was write a letter (over lockdown) and send it to her in the post. She'd read it, was delighted and then filed it away in her filing system (randomly stuffed into cupboards). My parents found it and used to get the letter out and leave it on the floor every time they went round (particularly when they were trying to leave), so she could experience it all over again. She found that letter about 90 times in all and was delighted to read it and get an update every single time.
You can weaponise dementia for happiness if you hack the illness for your own nefarious purposes. :o)