I read fic where Lois and Clark are divorced and Lois is working for TV news company. She is trying to explain to Lucy (Without give up Clarks secret) why it didn't work out. Clark calls her to ask her to dinner because it's her/his birthday or would've been their anniversary she agrees and it ends on her thinking about wearing burgandy.

please

I think this is the one you are looking for:

Sometimes Love Isn\'t Enough by Tank that was a great one I really liked it.