I got married to my husband last year. He mentioned me about his girl friend before marriage but I never doubted him before but recently I don't know I started asking him about his ex. My main concern is that he should have never slept with her before me and if he have he should tell me. I have been questioning him about her he have told me that he had relation only for 1 year in college and also he told me that he didn't wanted to marry that girl because of culture differences so he didn't want to sleep with her. He also told me having sex before marriage is not considered right for him.
He also told me that I can ask his ex and clear up my mind so that we can happily live after that. He also mentioned that he just kissed her few times and once she tried to get closer to him but he stopped her. He also swear to god and parents that he have not done anything.
But I do not believe anything he say, I do not know why I can't believe him I still get doubt that he is lying to me, he is hiding something from me. I don't know how to overcome this situation. Should I contact his ex to clarify my doubts?