These are characters who are aunts: biological, adoptive, marital, half- and step-, as well as older ones, including (great-,great-great-, etc.).
“CeCe Williams is the sister of DeDe Pritchett who is mentioned in "Valentine's Day 4: Twisted...CeCe Williams
“Becky Pritchett is or was the sister of Jay Pritchett. She is mentioned in The Kiss when Jay...Becky Pritchett