That may be her remembering the marriage, or it may just be her remembering the same thing Peter remembers, which is that they were in a relationship and living together for most of the time they were married in the old continuity. Her being coy about it may just be because Peter doesn't know that she remembers his identity. (There were two different kinds of retconning from OMD. The marriage retcon was a changing-the-past thing, the secret identity retcon was a wiping-people's-memories thing.)