Hello K., As the mother of 5 and the grandmother to several grandchildren, that went through through cancer and then the death of the father and Papa, they loved--- Don't kid yourself that this isn't effecting your children. Each in thier own way. To do so is just plain silly as my son says.
When you want out of a uncomfortable situation- haven't you ever laughed- even wen laughter is not right for the moment?, little girls I have learned are all drama queens and some of my daughters, and esp one granddaughter could out do Elizabeth Taylor, for the Emmy's!! I have one grandchild that won't go to sleep unless "Daddy" holds her hand, and another that wants "Daddy" to hold her and just go out and see the moon with her everynight. None of this is unusual. They are just in love and know that Dad's a softer touch than Mom, who has had it after an 18 hour shift of parenting...
One thing that needs to stop is the crule manner of treating others in the family and to the pets! If time out doesn't work, then at some point the big sisterwill hit back and you will have to know that she was defending her right to safety.( with my 5, I thought the boys would really go at it and never get over it in life because it was always about one up manship- but as adults they are the best of friends and even take vacations together)( the girls, were so different- like night and day so that was drama all by itself).
All this may come from just wanting to be the star of the show --- but for my children it was all about the power they thought they had and wanted to see how far the family boundries would stretch. I am a firm parent in that I believe in building a foundation for them to live upon for the rest of thier lives. I had to set boundries that they knew were cast in concret, and yet be flexable if I needed to be. Try putting on music for your little one that she can sing herself to sleep by. There are great children's songs, childrens hymns, soothing sound/ relaxzation tapes etc you can buy, for my youngest son at age 3 becasue he was 13 years differance from his brother and that brother was into Phantom of the Opera, and Opera in general, we had CD's that were played until he fell asleep -- infact they actually played all night so if he woke up he thought he hadn't fallen to sleep and relaxed and fell right back to relaxing.
I am sorry about your father. I hope that you are blessed with doctors that will help him and he will be with you for many years. I know that for us becasue D., had never smoked that added years and quality to his life when it hit his lungs. I will add your family to our prayers and church prayer rolls. Nana G