No, Tisha Campbell-Martin (born Tisha Michelle Campbell on October 13, 2023 in Oklahoma City, Oklahoma), and Paula Jai Parker (born on August 19, 2023 in Cleveland, Ohio) are not sisters, although they do have something in common...
Both women married men with the surname of Martin: Parker married Forrest Martin in 2005; they have 1 child together, and Campbell married Duane Martin in 1996; they have 2 children together).
Campbell got her first professional acting role in 1977 in a short titled The Magnificent Major; in total she has 48 acting credits to her name with the latest being on LA Live The Show in 2013.
Parker got her start in 1992 appearing on the Apollo Comedy Hour; she has 66 credits to her acting career with her most recent being True Blood this year.
A great tip for keeping up with Campbell is to follow her on Twitter @TishaCampblMrtn.
In "can't wait to see more Paula Jai Parker" news, she has two films gearing up for release in 2015: Taco Shop, and Last Call at Murray's.