Hello Priya I understand your problem and i want to assure you that this problem is not very uncommon. Performing first intercourse after marriage is many a times difficult for some couples. The few reasons are: 1. Performance anxiety in which either of the partner feels anxiety of how he/she would do it, will he/she be able to satisfy other partner. 2. Vaginismus in which there is excessive pelvic muscle contraction by female partner in the apprehension of feeling excessive pain. 3. Some misconceptions about sexual relations and intercourse. 4. Increased excitation which leads to premature or abrupt end of the intercourse without full satisfaction. 5. Presence of hymen in virgin females. I think you have had hatred about sex in past which is leading to this problem. I would advice you to spend more time in foreplay. Feel comfortable with your partner in bed. Get adapted to this keeping in mind that sexual relationship are a need of the human body. With constant trials you both will be able to do it. Hope this helps you. Thanks.