Has Nicollette Sheridan's time on Wisteria Lane screeched to a halt?

Sunday's ratings summary minus specifics for CBS (which, due to NCAA tourney coverage, experienced overruns and overlaps that frankly make my number-crunching head hurt):

8 pm/ET
Extreme Makeover placed second behind CBS with 9.77 million total viewers, a week-to-week-gain of 290K. Fox's The Simpsons (6.15 mil) and King of the Hill (5.49 mil) combined for third, each inching up a bit. NBC's Kings got crowned in its second week, dropping 24 percent to 4.58 mil. 

9 pm
Housewives topped the hour with 14.66 million viewers, up 230K. Fox's Family Guy (7.45 mil) was up a hair, but American Dad (5.85 mil) was flat. Celebrity Apprentice saw 7.3 mil (up 600K) tune in for Dennis Rodman's meltdown. 

10 pm
Brothers & Sisters placed second behind CBS with 10.4 mil, dipping 180 thou.