Oh dear, Pixie. Sounds like your granddaughters are being fed some pretty nasty stuff, especially the what would they will get when you die bit, that is disconcerting. I would think this is all stemming from what they hear from their parents, not from the girls themselves.
Re the text from your son......mull it over for a while.
It does seem like he wants to offer an olive branch. How you proceed is up to you. Maybe accept it with grace but put your version of the red velvet rope in place. Proceed with caution and protect yourself.
Maybe keep your reply bright and breezy and totally non committal - something along the lines of....."all is good here, we are both very well, thanks for asking".
Don't invite them, don't suggest meeting up. Put the ball back in their court. Don't ask how they are because that requires an answer, so you could maybe just say something vague and innocuous like "hope all is well your end".
Is an apology important to you.
I have decided not to push for either an apology or an explanation. I decided to be magnanimous and accept the olive branch for what it is......hopefully a stepping stone to rebuilding our relationship.
Personally I feel that pushing for an apology from my son and especially my DIL would be counter productive. They would probably get very defensive and It would likely inflame her narcissistic rage. We would be back to square one.
It might seem like I'm copping out and being a doormat but I'm not. I'm just playing it very cool.
I am trying to be "the bigger better person", not stooping to their level and not engaging in silly mind games. Does this mean I'm not hurt, not a bit of it, I'm still wounded by the way I have been so unfairly treated.
I am not sure I can ever really forgive and I certainly won't forget but I'm prepared to let bygones be bygones. I don't bear grudges but it's not my job to give them absolution. We all have to live with our consciences. Mine is clear, I sleep well at night, I don't have to live with remorse or regret. The fault is theirs not mine. They have to live with that.
They are very lucky to have me. If my husband were alive he would most definitely have borne a grudge. Madam wouldn't have had a look in with him.. My husband was a kind and generous man, but you crossed him at your peril. He didn't give second chances, I think my son knows this.
I know some might think I'm being too soft but I am not. I now know what I'm up against, and I won't make the same mistakes again. The boundaries will be firm and at the first sign of trouble the drawbridge will be pulled up.
It's not often in life we get a second chance. I'm taking that second chance, it's a leap of faith but I'm keeping my wits about me. I wont get fooled again.
Fool me once, shame on you. Fool me twice, shame on me. ?