I just did the quest for Mjoll the Lioness and got her Grimsever back, asked her to marry me, waited, walked to the temple of Mara and she is the only one missing. So where did she go? :huh:

Anyone?

stood up at the alter, obviously

Load a save and try again.

Cheers

Also my first thought, but she isn't in Riften anymore looked everywhere for her :nope:

Obviously you got "used", she needed that sword back, and well... that was one way to do it. She's halfway to hammerfell by now.