My first crush

My name is Helen I stay in Chicago. My father has a big financial company which I would love to take over one day but my father is to old school for that, it's a man's world and that is that. My sister Antoinette has no ambition to work, she just wants to be a trophy wife which means her husbands wants my fathers company, his been working for my father for years but his not even on management level yet. I work for my fathers rival company.
My sister is getting married and I'm one of her bridesmaids. On the wedding day I see my first ever crush standing next to the groom, as a the best man. Thank fuck my sister wasn't marrying Johnny I don't think my heart would have been able to take it. As it is I saw Johnny and my sister have sex 10 years ago and it shuttered me into pieces. At the day of the wedding as I was walking down the aisle Johnny was standing next to Jake my sisters soon to be husband. Johnny didn't take his eyes off me and I couldn't take my eyes of him not even for a second it was like he was calling me with his eyes.
That night Johnny and I spend a very steamy night together, but according to Johnny it should all be in secret if my sister and her new husband finds out they will try to rip us apart but Johnny never told me why he thought they will.
Will Johnny and I found our happily ever after or will my obsessive boss get in our way or will it be my sister and her new husband. who will keep us apart this time?