ms. bad girl and mr. nerdy boy

it's about a boy and a girl who had relationship for 5 years but the girl don't know that her boyfriend is her brother too but the boy knows that his girlfriend is his sister he don't want to tell her girlfriend because if he tell her girlfriend it will break its heart his mother just told him to break up with her because his girlfriend is her sister in other side when her mom told him that she is his girlfriend he really cry about it because of pain in his heart but still he will save there relationship by nit telling her girlfriend that they are sister and brother... he keep all this secret for many years only one person who know and that is his best friend but his best friend has a secret that his best friend is in love with his girlfriend so he don't know if his best friend gonna tell the truth he is so worried about it because the time he tell his secret he don't know that his best friend is in love with her girlfriend after he said his secret his best friend just told him also his secret
(after classes)
he always telling to his best friend
that do not say their secret ..
his best friend told him that he will not tell there secret because he cannot break his best friend relationship.