You can't take it out on your H if the OW calls. She will probably call for some time in the future if she is still doing it now. It appears that he is being honest with you about these calls and that is what matters.....
All you can do is assess your H behavior and it appears from what you've posted is that he wants this to work out with you, not the OW.
Sometimes you have to bite your tongue to keep those insecurities from showing. I know this. When I've managed to handle myself without over-reacting I feel so much better and so does H. It allows us to have a good time together instead of me getting upset and going into a downward spiral.
hang in there- this isn't going to be easy to get over your insecurities. Perhaps you should focus on the good whenever you start to go down that counterproductive pathway.....
