“Is This What You Call Love?” – Susan is in for a shock when daughter Julie pays a visit and shows up six months pregnant; Bree’s alcohol consumption and lust for men continues to dominate and ruin her life; Lynette’s first sexual encounter since separating from Tom doesn’t quite end in fireworks; and Gaby’s attempt to sooth Juanita when she doesn’t receive a Valentine’s Day card from a boy she has a crush on backfires, on “Desperate Housewives,” SUNDAY, FEBRUARY 12