I very very rarely like age play (more like, tolerate it? when everything else around it is good) and this book definitely falls under Do Not Like for me. I dropped it around 83% in, when the fucking binkie came up. 

Apart from that, I found the characters poorly developped, basically neither of them had a real personality. Joseph's only character trait from the moment the daddy kink starts is just to "be a child" if being a child could be called that. Forrest is just there to be creepy and intrusive, I guess. 

Anyway I'm going back to Cara Dee for fabulous kink, she's the only one I trust.