sorry to hear you going through such a tough time. i think its fine to tell your husband and your therapist. I don't think it is good to keep secrets of this type at all but i understand that your family wants to keep it within your family. Doesn't your dad include your husband as family ? I hope you can find some peace with whatever you decide to do and

hugs from me, take care don't be afraid to talk to your T everything is confidential remember.