She was afraid to ask because of what happened to Sonny. Sonny left the house in a rage because of Carlo beating Connie. The family blamed Carlo for Sonny's death. I'm sure Connie and Carlo felt a coldness from everyone around them. Of course, we find out later the whole beating of Connie was staged in order to lure Sonny to his death.
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"Tattaglia was a pimp he never could have out fought Santino" Don Vito to Tom Hagen