dear Denise, unfortunately the same has happened with my ex and our eldest son, who has a 3 1/2 and 6 month old, both girls where the same has happened for about a year, but it's a stale mate, neither will budge, but with them it's really the ex and daughter in law that don't get on well.
I'm so sorry for you but what I do hope is that your daughter changes her mind which is very possible to happen, as with the same situation in my case, which doesn't include myself.
I only wish it would change for all of them, and in my case, my ex has never said sorry to me in our 25 year marriage, and still won't, and I'm certainly not referring to you.
Would like to know what you think. L Geoff. x