Officials say Carmenlita Steven's four surviving children were among those attending Saturday's service for the 44-year-old woman and her 13-year-old son, Quavon Timothy Foster Jones.
Steven's boyfriend had held three of the surviving children hostage during the standoff.
Authorities have said Steven and Jones died from stab wounds on April 25, nearly three weeks before the standoff began May 10.
It ended two days later when hostage-taker Gerald Tyrone Murphy was fatally shot in the head by police who stormed the home.
Authorities have said Murphy killed the pair, but a motive has not been determined.