She’s reading Molly O’Keefe’s Between the Sheets, #3 in her Boys of Bishop series! I reviewed it here. (Spoiler alert–loved it!)
FYI, it is NOT a Harlequin book, as the “Suicide Squad Trailer Every Easter Egg and Reference” video asserts (though he does a decent job of explaining the premise and does say it’s a good read–don’t get me started on the screen definition of “Harlequin” though!) but was published by Random House.