Hi Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand your concern... A tight vagina is normally as result of low vaginal lubrication or vaginal dryness. This problem could arise from many reasons such as low estrogen hormone level in female, low foreplay before sex, some vaginal infection etc. I think lack of foreplay must be the reason for vaginal dryness leading to a tight vagina. Foreplay is very important part of sex. It consist of kissing , hugging, clitorial stimulation etc. It produces natural vaginal lubrication in vagina & makes it ready for sexual activity. You could also use lubricants during sex. They are easily available in market. A vaginal moisturizer used by female could also be helpful. Refer her to a gynaecologist if problem persist Hope this information helps Good luck