You are a worker for IMP. You lived a pretty normal life till you met Octavia. She acts the exact same around you, as Stolas does with Blitzo. This would hypothetically be the greatest thing ever, having a beautiful noble girl acting like that, but in practice not so much.

Either way, emboldened by her father's relationship to a commoner she begged and pleaded with her family to let her marry you. Eventually she got their support, and after everyone put all that time and effort in your rejection was the last thing that would stop the wedding.

Since she is the noble, and you are just a commoner, not in line for the throne, she gets to wear the suit, while regardless of your gender you have to wear an ornate wedding dress. You are now being fitted by a couple poor servants.