He could have possibly moved from one woman to another. The second might be very short term as well. If you want to stay with this marriage, you might want to calmly confront him with the evidence. Then suggest counseling for the both of you to help repair the damage that has been done to your marriage. It will take time to trust him again. You might want to ask yourself what you really want for your future? Do you want to try to rebuild the marriage or would it be better to move on? So sorry you are having to endure this.

Best wishes,