Look out for the signs below so you can initiate a conversation with her fast. Before things get out of hand.
1. She initiates sex more often: If your once sexually-shy partner is suddenly into s*x all of a sudden, then be wary. Sure, you might want to give in to the bliss of knowing you do not have to cajole her for s*x but a sudden change like this usually means something is up. If someone else has her juices flowing all day, she will be so turned on that she will want to let out her sexual frustration by having s*x with you. It is like she is feeling the excitement of a new relationship but she comes to you for the s*x part. Be sure to discuss this before she starts going to him for the s*x part too.