 When Robbie first began filming , she was told that Donna was bisexual . Of this Robbie said , " In one of the blocks she is talking to Bridget about their ' first time ' and Donna asks Bridget if it was with a guy or girl ? I liked the way the writers conveyed that , it was just really subtle and they didn 't make a big coming out scene of it . I think it 's a good message to send out because it 's not such a big deal to lots of people . Not all of them have such drama surrounding it " . Donna 's first storyline that included this aspect of her character was a kiss between herself and fellow female character , Sunny Lee ( Hany Lee ) . The kiss occurs after Donna discovers that Sunny has been writing the romantic love letters given to her by her boyfriend . Sunny is shocked when Donna leans over and kisses her on the lips , as it is her first kiss . The show 's producers called the kiss between Sunny and Donna as " impulsive " and Robbie agreed saying " It 's really not a big deal at all . It 's not an actual gay storyline , it 's just kind of an impulsive peck " . The storyline came weeks after rival soap Home and Away endured a backlash to its own same @-@ sex romance . 
