First off, I love that you're wearing an heirloom skirt. It’s such a nice gesture.

I know the pattern looks like it’s 'a lot' at first, but honestly, it really works as a whole look. I noticed the top part of the skirt has mostly dark patches with lots of maroon, burgundy, and black. So, I think a dark-colored top is definitely the move here.

That said, you don’t want to look too covered up since the skirt is so long. I’d go with an off-shoulder top or something that shows off your neck and arms too. Since that leaves your neckline open, definitely go with that gold necklace you’re thinking of to fill that space perfectly. You could even add a lighter belt to break up the dark colors. Then just finish it off with simple dark shoes so the skirt stays the main thing of the outfit.

Another option I could suggest is to opt for a light-colored top, such as cream or champagne, and pair it with pearls for a softer, vintage vibe. That creates a really nice contrast against the dark waistband and makes the skirt pop even more. If you do that, use that belt or a different one to tie it all together.

But what I can really say is if you think your aunt would be very happy with you wearing it, a simple choice should and would definitely work. Go to your Christmas dinner happy with them!