A few months after our (big, jolly, scandal-free) wedding, friends of DH got married. I later found out that the bride had been keeping a big box under her bed since about the age of 12, in which she'd kept all her wedding ideas - dress, bridesmaids' dresses (I seem to remember she had lots of younger sisters), flowers, cake, rings etc. I know lots of friends who knew the couple better said that they thought if the couple hadn't been getting married, they'd have split up by now, but bride was determined she was Having A Wedding.
At the wedding reception (a big function room), DH and I were having a drink when a voice said "So what do you think of that DICKHEAD then?" This was the Mother of the Bride. Who was dressed from head to toe in black, including black lace gloves and a mantilla. She proceeded, loudly, to slag off the groom, whom she always referred to as "that DICKHEAD" and ended up by saying "the last thing I told my baby girl before she went down that aisle today was it's not too late, it's never too late, you can come home tonight and we'll all pretend it never happened." Didn't know where to look or what to say.
She then walked from group to group, saying the same thing. The night went on in the same vein and all people could do was drink, so we got wrecked and had to go home early.
The couple, who I didn't know well, but had quite liked, separated a few months later as he cheated on her. Really sad.