Well said g790403.
The bleeding after sex is normal, especially after the first time, and even the first few times.
The blood around her anal area probably is just blood from her vagina that ran that way- it happens. Like g790403 said, if it doesn't stop within a few days, tell her to at least call a doctor. Also, if the blood turns from red to brownish, dont be alarmed, thats completely normal also.