As time goes on she will get sloppier and sloppier with trying to keep the A secret. i agree that likely the A is still going on. It took me a year to finally find out what my H was doing but remember to follow your gut instinct...it is almost always correct (with regards to what your heart is telling you she is doing). Of course you can't follow your gut with what you want to do with what you know! This could end in losing her forever!
Giving her space right now is probably the best thing to do. Remember that most A's last only about 6mo and once the "honeymoon" stage is over she may start to realize what it is that she has done.
Take care of yourself...GAL and focus on you. I hope for the best for you. When I started down this road i said to myself that i would give it 1yr and if after a year things still hadn't changed then I would file for separation. After finding out that my H was in fact having an A with a co-worker and he told me that he didn't want to end it and didn't want the M I filed for separation. Not sure if this was the right thing to do but things were so bad that I couldn't see any way of repairing things
Bonuses for you: you are young and there are no children. It does make things less complicated and if it does end in divorce you have your whole life ahead of you and you will find someone else who will be willing to have the life with you that you deserve.
Hope some of this helps.
M=42 H=51 Common-law 6yr Children: 11yr old daughter (previous marrIage) 6yr old son Bomb dropped January 2013