My Bad Decisions (On My Own Book 4) by Carrie Ann Ryan

The first time he kissed me, we kept it a secret.
Tanner and I have been at each other’s throats ever since.
The second time he kissed me, I told myself not to fall.
I should have known something burned beneath the surface and I couldn’t resist him.
The third time led to something more and now one positive test later, neither one of us can walk away.
Only when his past sheds light on every difference we’ve chosen to ignore, we’ll have to fight for each other, or lose everything before we’ve even had a chance.