I'm sorry to hear this and I hope Sweetie makes a quick recovery. I understand your concerns with the stress of Sweeties bed rest and what to do with Lemon as I had the same dilemma with Oisin and Noah. Try to stay strong and remember you have Sweeties best interests at heart. It was hard watching Oisin watch Noah flying around but I felt it would be unfair to keep Noah in when he didn't need it and I know Oisin understood.
Poor Sweetie get well soon