The Road that Leads to Us by Micalea Smeltzer

Maddox he hasn't changed much boy is still cray cray, “it’s like you’re all conspiring against me,” he muttered. “I can’t trust any of you. At least I have my hedgehogs.” He stroked the quills of Amy. “They would never betray me this way.” Dean's woman sure has a way with coming up with names:
                      “Hot Buns?” I repeated in disbelief.
                      She shrugged and sat back with a smirk on her lips. “You have a nice a**. It seemed fitting.”
                     I snorted. “You’ve been checking out my a**?”
                   “Like I said, it’s nice.”
I really enjoyed this book I loved seeing the kids grown up.