How can husband cope with Retroactive Jealousy

[liveit]

It sounds like your previous relationship was exploitative and traumatic for you. There are usually underlying reasons why we get ourselves into those kinds of relationships and I suspect your husband's therapist thinks you'd gain something from looking into why or at the very least processing the trauma from the relationship itself which you may never have had a chance to do. This in no way suggests that you are somehow responsible or that you've done something wrong here. This is an opportunity for you both to gain self-awareness and self-acceptance which will ultimately allow you to become more intimate with one another.