SOLVED. A woman gets hired to be a personal assistant for 2 men. Spoilers ahead

[Angel]

The book was about a personal assistant to 2 men. They wanted her to work till 7 to 730 pm. She has a little sister or neice that she helps take care of with her aunt or grandmother. When she left for the day she got to the lobby and the men called her and said she she didn't get back up stairs in 3 to 5 minutes she would be fired. She thought the elevator would take to long so she run up the stairs. When she got up to the office the one guy looked at the other guy and said " see I told you she would make it"
I seen this book in a ad on Facebook about a week or 2 ago June 20th to July 1st 2021 and I read the few paragraphs it had and then saved it into my saved pages to look up and read later and now its not there. I don't even remember the book site/app it was on. I hope someone can help me find it. Thanks

[Angel]

Fated to them is the title