C, so glad you are making new memories with your son.
And yes, MrCas is right.
But I want to add, I wouldnt have added that little bit about son missing her.
Serves no purpose but to lay guilt on her and the backlash is that you had an expectation of her response and got angered when it didnt happen.
Also, in dbing, you want to be positive, right? So, a simple we are having an awesome time, gotta go make some sandcastles - might be better for next time, ok?