She's pregnant again.

So my niece, the same age as me got pregnant by her new boyfriend. She already had two sons and she's now expecting again. She broke the news by saying to me "Auntie, I've gotten pregnant first, again, before you. We are not even trying, I am also taking my contraceptive pills but I still got pregnant!"

At first I want to lash out to her because she knows that we are trying for over a year now and I was also asking her for advice about it. But then, maybe she was just so happy that she didn't think about what would I feel. I am happy for her, I even joked about how was she able to do it so fast? Can she recommend the positions she did while doing it. I need to say those things to ease myself from heartache. But after that day, I started to distance myself from her. I chat her every now and then, but I still feel sorry for myself every time I see her.