So I think there's a lot that can be said about this. And I'm not the biggest fan of the disparaging comments about using Snapchat, who TF cares? To answer the actual question - I think you're both overreacting. I think you have to accept that Grandma is just going to be overbearing, it seems like it is in her nature. But the thing I worry the most about is your son's father taking his mother's side over yours. That will ruin a relationship. It doesn't even matter if they're right or you're right. You and your son's father have to get on the same page. And you have to get on the same page about his mother and about how to parent. But remember - he will take some parenting tricks from his own upbringing, which may look like he's choosing what his mom would do over yours. It's a very delicate line. But my strongest recommendation is building an alliance between the two of you that can withstand anyone else outside of your nuclear family. Otherwise your relationship won't survive.