Told GMA about pregnancy

So I'm here to say I finally told my grandmother about my pregnancy. She raised me and I knew she was going to be upset, she told me I was raised better than that (sex. Before marriage) and that she will be here for me no matter what. I hate to feel like I have to burst out into tears because I have to disappoint her. But in a way I know she is happy, she was talking how my 1 year old nephew is going to have someone to grow up. But I hate to see her like this and didn't want to add more stress on her. I know within time she will happy. pregnancy hormones are going crazy right now