Yes, agree with @DDream . It's better to walk out now that you are on home turf, especially if the marriage isn't consummated yet or it was a fake performance put up by him ( only you can judge that ). But I also wonder why he came all the way back with you to India when he had something to hide .Could it be that he wants to come out of the closet now ? I also agree with the therapist - there is no test / scale to measure or grade someone as per their sexual inclinations.One could be attracted to the same sex or the opposite or both , and still keep it to themselves . He needs to come out on his own , which he doesn't want to probably for his own reasons .