Nia Rae: A book about boobs and space and stuff (The Kali Series, #1) by Debbie Taylor

Nia Rae, daughter of Senator and Senator Rae, has an unfortunate habit of doing stupid things in front of cameras. When her latest mishap causes her to accidently halt time travel she finds herself (and her boobs) in the centre of a media frenzy. She also learns that she isn't who she thinks she is and a whole host of people are out to kill her. Oh and the man she loves is in love with her ex-boyfriend. Part one of an epic polyamorous bisexual science fiction romance that will change the course of history.