The `Mad Men` actress - who tied the knot with `(500) Days of Summer` actor Geoffrey Arend in October 2009 - admits their relationship changed after they wed because she felt more "connected" to her spouse.
She explained: "I felt more nurturing towards him [when we married], like he`s here forever and I`ve got to make sure he`s healthy and fed and clothed and loved.
"I felt much more connected to him. There`s something about having all your family in a room and announcing it and celebrating it that makes it very real."
Christina, 36, also admitted she "freaked out" Geoffrey with a passionate declaration of love soon after they started dating.
Asked how soon after they started dating she told him she loved him, the actress told the new issue of Britain`s Cosmopolitan magazine: "Not long - and I cracked it out in such a big way.
"I was like, `You make me want to have a family.` I freaked him out a bit... Thank God I didn`t spook him enough to make him leave."