"DESPERATE HOUSEWIVES - ""Mother Said"" - Adele Delfino, Susan's mother-in-law, arrives for a visit, on Desperate Housewives,"" SUNDAY, MAY 11 (9:00-10:02 p.m., ET) on the ABC Television Network.  (ABC/DANNY FELD) CELIA WESTON, TERI HATCHER"
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