SOLVED. Ex military security romance series with protagonists having Russian surnames. [s]

[[deleted user]]

The book series is about siblings (Russian last name, but books are based in the US) who are ex-military and do undercover at a lab for a secretive head, I think. (one of the sisters is also ex-military, not just the men) One of the books I remember is about one of the brothers (male lead) doing security for the female lead, who is one of the scientists at the lab. She was a kid genius, and was kidnapped by a terrorist group when she was younger. She also does belly dancing and doesn't have a verbal filter, just says all that she thinks. Her research is something groundbreaking about plants, as far as I remember. I read this a few years ago, not sure exactly when, sorry. Any help would be appreciated, thanks!

[Mai]

This book came up searching "book" "series" "security" "the lab" "belly dancing":
Watch Over Me by Lucy Monroe. It's Book #9 of the Mercenary/Goddard Project Series.
Super-spy Mykola Chernichenko comes from a family of geniuses, and though he's no idiot himself, he'd rather be where the action is than analyze it to death. That's why his vacation has just been cut short by a call to get two of his siblings out of some serious trouble--while protecting a nerdy scientist whose latest project could change the world...and get her killed.
The guy who'd rather act than think guarding an egghead in a lab coat? Myk would appreciate the irony more if he weren't so busy trying to figure out how, exactly, to get under said lab coat. Because Lana Ericson just happens to be the hottest thing working the scientific method since, well, ever. Myk has a feeling Lana's laser-like focus would translate to something equally intense in the bedroom. And if she's as curious about him, Myk might just be willing to donate his body to science--each and every night...

[[deleted user]]

Oh yes, that's the one! Thank you!