I am a bridal seamstress in a large bridal shop. She may want to wear your dress for her wedding. First you can take off the sleeves to give it a more modern look. You can use the lace from the sleeves to add a nice edge to the armhole. You may want to make the armhole narrower...more like a tank top. Since it is an 80's dress, if there is a stand up color...remove that too and add lace around the neckline. There are lots of ideas to bring an old dress into the current fashion trends now.
You can also make a Christening gown from it for the first grandchild. I have also seen beautiful Christmas tree toppers made from wedding dresses. Lots of ideas around....just keep asking. Please post pictures and that may help with the ideas.