What if during Korra & Asami's vacation in the spirit world...
Asami grew especially fond of this one type of flower. Korra took note of that and literally just an hour before the two lovebirds wedding, she went back to that area in the spirit world to pick a bouquet full of those flowers for her soon wife to be.
Everyone is frantic about Korra’s sudden leave of absence since all she said was “I’ll be right back”. Making it back like 15 minutes before her own wedding she has the bouquet sent to Asami’s dressing room before being rushed off herself to get dressed.
Asami receives the flowers & is in tears b/c that is just one more of the many million reasons that makes her fall harder for Korra and her charm every day.