I understand more now why it's so upsetting that she didn't tell you. Mine is also very open about a lot of stuff and I'd also feel deeply upset if she didn't share her news of her marriage with me. It doesn't mean she is ever obliged to share anything, just that it's how she is and what I'm used to with her. So it makes total sense to me. I'm sorry your T didn't say anything. I hope you can share your hurt with her.