Of course she spent a large amount of her time at home and if wasn't at her mansion, it was another socialite's. It was a world Millicent should have been a part of, could have been a part of, if fate hadn't had other plans.
"Who would have imagined." Any Malfoy working period. "But I dare say there is nothing wrong with overseeing the upkeep of one's home." They had house elves to do the menial work, of course, but someone had to direct them. "I have found myself doing much the same since my return to life."