Crossing Love [Petra X Crosshairs/AOE Fanfic] (UNDER EDITING)

[Story contains graphic themes not meant for younger readers or those easily disturbed, book is currently under major editing and it is unknown when I will be done with editing, cover art not mine]
Petra Stirling is a woman who's been to hell, looked into the eyes of the devil and smiled
She's one of the few still alive survivors of the Wither Sickness outbreak of her hometown in Austin Texas after her mother violinist Lindsey Stirling and her few friends had passed from the sickness of the recording hundreds
Petra refused to be taken care of by her father despite being a nearly grown woman and left wherever the wind took her until she met Cade Yeager and his wife while she was still pregnant with their daughter Tessa
She was like a daughter to Cade and a big sister to Tessa, helping them how much she can of their debts and whatnot even after Cade's wife and Tessa's mom passed in a hit and run car crash
Though often tired and annoyed with Cade for his inventions and whatnot, she does try to put up with them for their sakes
But when Cade brings home a truck that turns out to be the Autobot leader Optimus Prime
Now tied with the fates of these in hiding Autobot's as their on the government wanted list
Is Petra able to handle it all especially when she feels her heart began to pull to the Ex-Paratrooper Autobot Crosshairs?