The first sexual conjugation cause to bleed if the hymen is intact. The hymen is close to the entry, usually about 1-2 cm inside the vaginal opening. So the bleeding
what you are telling not of menstruation bleeding, but due to rupture of hymen bleeding. 2nd query about the conceive that depend upon her menstrual cycle. If her menstrual cycle is 28 to 30 days cycle in every month, then any sexual conjugation within 8 days before or after of menstrual date is safe. If period is getting delay then after 10 days of expected period date do the pregnancy
test. Thank you.