Well,

You asked for opinions...

You are dating a "loose" woman. She doesn't appear to have a lot of morals or ethics. You know this yet you still want to be with her. You are getting in deeper the longer you are in it and will continue to be sucked into this drama. The fact you don't want your ex to be with anyone tells that you are not ready to move forward and continue to use a "bandaid". But that is your choice. If you feel you deserve better - then choose better.

Harsh words perhaps - but the truth.

Barb