She might have a hunch there are things you haven't shared yet, and perhaps that feels like suspicion to you, but I bet it's just concern, caring, and a bit of worry. You've said you feel guilty about not telling her, so that might be why it feels like "suspicion," but you have not done anything wrong in not telling her yet. You couldn't yet, you weren't ready, that's not your fault. I just hope you tell her soon because I hate to hear about anyone suffering from what you are suffering and I hope that you can find help soon. There is no judgment in that, just compassion.

Please don't let having seen your dad cut you off from her support. If you don't feel like you have the strength to go on Wednesday, I think you should contact her, let her know something bad has happened (you don't have to say what)... I hope she can encourage you to come in as planned.

I liked growlycat's suggestion about contacting a battered women's shelter or similar group. I'm sure there are abused women married to prominent men who fear not being believed, so they should have some experience with how to handle that. Between them and your T you can start building a support team to get you out of this.