I have two younger brothers

 Love advent will never suspected and never be realized. It could be the love that comes when you're going to the market. Or it could be the love that comes when you're sightseeing. 

 Well, the arrival alone is not known, what else ya person. Maybe we fell in love with his own sister friend or friends own sister. All that could happen, because it would not hurt if you fall in love with a friend's sister or your sister.