If you want to go through the pain of being betrayed again then reconcile

You guys have been dating for a few months

You guys were apart for a few weeks and she was feeling lonely and isolated while she was visiting her FAMILY. And all she could find to help her with loneliness was someone who she used to hook up with and now she wants couples counseling.

My friend you have been together for less than 6 months and you're already facing this issue, imagine what will happen when you guys will have to be apart for more duration in future?

You guys don't need couple's counselling, she needs an individual one to get over her personal issues and you need to block her once and for all. I can assure you there will be a lot of drama in the future if you decide to stick with her.