Annoyed... But am I overreacting?

So we are staying at my inlaws for the holidays and they put on a real of pictures. Anyways there is at least 50 of my hubby and his ex and my hubby voiced to turn the pictures off or go to more recent ones and his dad says why and he says because these are sh!t. Then his mom pipes up, I don't think these are sh!t I really like them. And then his sister proceeds to say that hubby's ex's son will be 5 this year(my hubby isn't the father of her kid, nor is anyone in the family) Am I wrong to be annoyed that his family keeps these old photos and watches them every year/few years? We have a 2yo and she's going to be asking "who is that girl daddy is laying on" etc... Maybe I'm just in a bad mood lol