I have terrible winter asthma. So, they don't invite us over to family gatherings unless it's Christmas. I go, and then seven to 10 days later, after I have compromised my immune system, I have terrible bronchitis. It lasted nearly three months last year. So here it is January, and I'm starting the new year sick and on inhalers and antibiotics.
Velvet is fine in cold weather and certainly acceptable to wear after the holidays.
His family, and yours, will be impressed that you both married courteous and thoughtful people.