'Grey's Anatomy' Couple Struggles to Make Love

Balancing their careers as surgeons with their personal lives has proved to be difficult enough for Meredith and Derek on Grey's Anatomy; however, becoming parents of an adopted child has made it more difficult for the two to find alone time.

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In tonight's episode, the couple struggles to find the time and place to make love on Valentine's Day.

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Just as they are about to make sparks fly in their car, Meredith's half-sister Lexie interrupts with their baby in her arms.

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"We're never gonna have sex again. Are we?" Derek concludes.

The full Valentine's Day episode of Grey's Anatomy airs tonight at 9 p.m. on ABC.