Fall Dirty (SEALs Undone Series Book 8);

Christmas wish fulfilment, grown-up style...or how a Navy SEAL's happy ever after gets a little freaky!
Navy SEAL Hunter Dex is a man on a mission. His beautiful new girlfriend is hiding her deepest desires from him and he wants that to change.
Serena Bradley is a woman with a secret. But when Hunter whisks her away for a weekend in Vegas with his friend Quinn, her hunger to be shared boils dangerously close to the surface.

originally published in the SEALs of Summer 3 military romance superbundle

The SEALs Undone Series
Fall Out
Fall Hard
Fall Away
Fall Deep
Fall Fast
Fall Back
Fall Dark
Fall Dirty
Fall Quiet