Birds of a Feather - Season 5 Episode 9 -

Dorien's visiting niece, Rosa, seems the shy, retiring type so Dorien and Tracey are amazed to find her in the Jacuzzi with Garth and none too happy when the youngsters start dating. It causes a neighbourhood split but Dorien and Tracey make up after Dorien learns Rosa is using Garth to get her father to buy her a new car and Garth discovers that Rosa is not his type.