For a recap, Shona is currently residing in a medical facility convalescing with her memory loss after being shot.
Sarah very carefully explained to Shona everything that went on between her and David. About David's rape and how she saved him. Desperate to assist her brother from being harmed, Sarah pleaded with Shona to come home and save David one more time.
Shona was reluctant because at the end of the day she still has no idea who David is - the evil thoughts planted by Clayton hasn't helped either - and has concerns that she may not be happy with him ever again.
Coronation Street continues on ITV/STV.