This was a quick and fun read, but fundamentally had some issues for me.

Mal was a fun, crazy character and I was glad to see that he was consistent throughout the book and that he didn't turn off that personality as his life changed and he grew/fell in love. That being said, there was too much joking in this for me, and to have Anne usually just rolling with his comments felt out of character and almost like she was stupid. I was constantly thinking 'wait, what? wtf' in response to Mal and his wacky talk, but Anne was like 'sure, let's go with it', and this felt off compared to how she was described as being so in control and having a history of being protective of her heart.
I think Anne's going along with the craziness Mal brought into her life was sort of explained away as her being "compassionate" or was retroactively made okay because they fell in love. There were multiple instances of her agreeing with him/the situation just because he basically was so damn hot/sexy that her brain derailed. That happening every 5 pages got old fast.

So while it was fun, Mal was constantly riding the line between kooky and obnoxious, and Anne seemed totally unrealistic because she like never really challenged Mal or had issues with his actions. So for me it was insta-love, and because it was a fake relationship there was missing steaminess.
Also, minus a few points for what felt like mildly excessive use of words 'pussy' and 'cock'.