One of the Clutter daughters, Beverly, was married just four days after the funeral.  She and her fiance, Vere English, were planning to wed in December of 1959.  The Garden City Telegraph reported at the time that, since the entire extended family was gathered for the November funeral, Beverly and Vere decided to hold the wedding then.  A recent interview with Beverly reports that it wasn't just convenience though:

Beyond the newspaper's reasoning for having the wedding early -- so many distant relatives gathered together -- English said the wedding allowed the family to seek a shred of happiness in a time of overwhelming sadness.