 After she stops taking her birth @-@ control pills , Donna believes she may be pregnant . Donna convinces Rachel and Bridget to take pregnancy tests with her . Donna 's is negative , but Bridget discovers that she is pregnant . Donna 's younger siblings , Simon and Tegan , arrive in Ramsay Street and their mother , Cassandra , follows not long after . Ringo and Donna break up and she becomes closer to Rachel 's brother , Zeke . They share a kiss and Donna decides to leave Erinsborough to sort her head out . On her return , she gets back together with Ringo and clashes with her mother . Before Cassandra leaves town , she tells Donna that Matt is not her biological father . Donna creates an online vlog in a bid to find her father and James Linden ( Tim Ross ) turns up claiming to be Donna 's half brother . They take a DNA test and James tells Donna that it confirms they are related . James later transfers Elle 's money out of her online bank account and leaves , devastating Donna . Donna meets fashion designer Saffron Jankievicz ( Shanyn Asmar ) and she is offered an internship with her company . Donna skips school and neglects her friends and chores . She decides to quit and Saffron slaps her . Donna presses charges and Saffron apologises . Donna befriends Kate Ramsay ( Ashleigh Brewer ) following Rachel 's departure and Bridget 's death . 
