In season six episode 11 "Humbug", she and Deeks agree to make their relationship official and finally become a couple.

What season do Kensi and Deeks kiss?

She may have been pregnant, but the actress wasn't! As for Eric Christian Olsen, he went with the first real kiss between Kensi and Deeks in Season 4, although that wasn't a scene overflowing with tenderness.

When did Kensi and Deeks fall in love?

In Season 6, Deeks and Kensi finally and officially become a couple halfway in the season and since then build a strong, loving and serious relationship while continuing their partnership.