 The results show that Sienna has cervical cancer, and will need a hysterectomy to remove the tumour, however this will put the twins at a high risk.Sienna is against the idea at first but after a heart-to-heart with Myra McQueen (Nicole Barber-Lane), she decides to have the hysterectomy.On Sienna and Warren's wedding day, Warren is stabbed by Grace because unknown to Sienna, they were having an affair and Warren chose Sienna over Grace.