What Causes Vaginal Dryness And Burning Sensation During Sexual Intercourse?

i get burning sensation when my hubby ejaculate inside me durning sex. i dont get wet anymore since i had my second baby 13mths ago. he stopped breastfeeding when he was 4mths. i feel very dry during sex and buring sensation during penetration. i dont have any discharge or pain afer sex. what can be the problem?