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It can be normal to have bleeding after intercourse for the first time because the there is a barrier (the hymen), that has to be broken in order for penetration to occur. This can result in pretty significant bleeding at the time of intercourse. It can take a few days to clear up, so what you are describing can be normal. Also, if during intercourse, there is not enough lubrication, small tears can happen in the vaginal tissues and this can cause bleeding. Finally, it is possible that the time of intercourse coincided with the time of her period and that is why she is still bleeding. Overall, if the bleeding is light (spotting with wiping, not filling a pad, and less than a period), it is not cause for concern and will likely clear up on its own. If it is heavy and/or forming blood clots, that is concerning for a large tear and she will need to be examined in a Gynecologists office as soon as possible.