Hard to Trust

A picture of my stepkids just hit my email in-box from the children's maternal grandparents' email address. After 14 years of them not saying a word to me, and for even longer than that for my husband since they didn't like him when he was seeing their daughter, why did a picture come from their email address? Is it bad of me to wonder "why"?

Isn't it a sad way to live that something that most people would think was a "nice" action, sending pictures, can't be trusted?