It sounds like you've worked hard to show your wife that you are sorry and try to re-build her faith in your bond.

In my humble opinion, it takes time. Not just a few months of being treated as though I'm special ~ but an extended period of time. Continued reassurance would help as well. {Sometimes, people become frustrated after a few months w/ their partner and want to see positive results already.} Yes, individual therapy would probably help your wife work through her emotions a lot.

While I've never been "cheated on", nor have I been the "other woman", I have seen men cheat countless times. I have always held a very deep, intense paranoia about my man yearning for other women. I can understand how devastated your wife was to discover your behavior.

Kudos to you for understanding your wife's perspective! I really think that's terrific ~ please do continue to show your wife how important she is to you. She will slowly re-gain faith in your marriage.