Yes -- the good news is there's an entire month for her to think on it. Anything can (and will) happen between now and then.

Be direct with your boundaries about it and then let her decide.

ME: 38
BF: 40
T: 10y, no kids, no M (by choice)
BD: 7/14/14, BF admits to PA, wants out, lies about new R.
10/1/14: I move out, BF lies about move in with OW
12/4/14: OW confronted, reveals all the lies