Sabrina Dawn plays a sympathetic daughter who takes in her recently widowed mother.  Soon the two are swapping sex tales of the past and these are then flashed on the tube for the viewer to enjoy.  Most of the sexual encounters in Grandma Does Dallas are tame, but the humor and unusual nature (a real life mother and daughter doing a sex tape) of this little show help maintain interest.  The scenes with Sabrina Dawn are scorchers and will please most.  It has been a while since a Dallas tape has come out and the title alone, along with its original premise, should help sales.