I guess you need to be there to support each other so her being there is good for you all. Such a shame for her not to have her daddy. Must be heartbreaking watching her seeing her say this.
I don’t know your son and this does sound cliche. But I’m sure he wouldn’t want to see you be hurting like this, my mum would be the same with me and I feel guilty for what I’ve put her through. May be you and your daughter and grandson and granddaughter should go away for a weekend together and have some time together and a change of scenery. It might do you all some good. I mean that in a nice way aswell. A break will do you some good.