NCIS: Los Angeles' Deeks and Kensi will jump into relationship turmoil as "Citadel" begins.

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Deeks' (Eric Christian Olsen) mom will make her NCIS: LA debut this Monday, and the highly anticipated visit will cause the laidback detective to stress. Is it time for Mama Deeks (Pamela Reed) to meet Kensi (Daniela Ruah) or should the two most important woman in Deeks' life pass like ships in the night?

In a new sneak peek for "Citadel," Deeks is determined to keep his mother's visit a secret...for now. Check out the clip below to see what excuse the cop uses to cover for his phone calls and off-limits apartment. Added bonus: watch Deeks dodge an incredibly awkward proposal question...

'NCIS: LA' Season 7 Spoilers: Callen To Return To Russia For A 'Reunion', Will His Father Appear?

Eventually, however, mother and girlfriend will come face to face.

"Things must be getting serious if he makes the choice to introduce her to his mom," Daniela Ruah (Kensi) informed TV Line. "Throughout [Citadel], Deeks gets calls on his phone, he doesn't tell Kensi who it is, he doesn't pick up... so you can see he's making the decision about whether he wants to take this step or not. And then he ends up taking it. I like that they've made it a thought-out decision."

Watch Densi take the next step when NCIS: LA airs Mondays at 10 p.m. ET on CBS.

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NCIS: LA, NCIS: Los Angeles, Television, CBS