I only had a single mastectomy with no reconstruction and that was bad enough although I did also have all my underarm nodes removed in a second surgery and that was possibly why I had more trouble with the arm. I don't think you will be able or allowed to lift anything more than about 5kg which will be a problem with little ones so you will need your family to help you. Hanging out washing was also out for me as was vacuuming floors. I had to hang my bathroom towel down on a lower hanger as it was difficult to reach up for several weeks. You will have to do arm exercises religiously to bring back the full use of them so pay attention to you physiotherapists instructions. Its a day by day thing but you do come good. <3