: She also said she was 23 more than once in the past.  Most of the ages on HBO's web site are how old they were when the series started, not how old they are now.  "Five years" could have been a figure of speech, or a mistake, or they could be trying to retcon her age so that Bill has also married someone too young.  If she is 21 now, how old was she when she first dated Bill, got married, had her first child, etc.  Except for that one line, all evidence points to older than 21. — •  •