Ah. I understand. I don't think you're being 'too sensitive' at all, but I also don't think it was her intention to minimise your feelings or make you feel like you need to be stronger. Having said that, only she can tell you what her intentions were - can you tell her how you're feeling about what she said?

It seems like your interpretation of her words is probably very much related to your relationship with your sister and how hard it is for you trying to be strong and helpful all the time? If you think there might be some truth in that, perhaps it's something you can talk to T about?

I know how strong an effect a T's words can have, and how easy it is to be hurt by them - it's certainly something I struggle with myself.