Hot SEAL, Undercover Groom by Maryann Jordan

Bored. That’s Nolan “Ringer” Bell’s existence in a word.

A SEAL used to action, he’s sidelined for a ruptured appendix and on medical leave at his mom’s house. Desperate for any action, he agrees to help his PI sister. The case…suspected money laundering through a wedding chapel with ties to a casino.
Easy, right? Until he meets his partner.
Lynn Cox, a financial fraud analyst, is about to get the surprise of her life when whe agrees to help her best friend with a case.
She’s now partnered with the high school crush who left her behind when he joined the SEALs.
Their assignment…to have a pretend wedding to get a close-up view at what is going on in the chapel and spend their “honeymoon” at the Casino resort.
Ringer’s sweet but meddling mother is the secretary setting up the details, providing them with the paperwork for their “fake marriage license”.

Discovering they are married for real, Ringer and Lynn have to figure out how to get unmarried while still investigating the casino mob’s money laundering scheme. A night gambling and drinking lands Ringer and Lynn in honeymoon suite. Maybe mom knows best, after all.