This makes me think it might be Sweet Dreams, no (though he wasn’t the Prez of an MC), but he WAS a biker.
Hrmmm… It’s been so long since I’ve read that book (2011? 2012? But, I feel like yes, and I LOVED that book). And if not, it definitely feels like a Kristen Ashley book (the heroine especially). Or was it Motorcycle Man? Either way, I know I’ve read it.