Of course, I don't know you personally, but I enjoy reading your posts and even just from what you've written on this forum I can tell that you are definitely not the type of person to take advantage of someone's help or generosity. I seriously doubt your T would worry about that (from you) either.

Try not to be too hard on yourself for asking for what you need. If your T wasn't comfortable giving you a discount then he probably wouldn't offer it at all. Most Ts have good boundaries around this sort of thing...and they usually aren't afraid to say what they will and will not offer (for example, he will refer out a high-risk client if he doesn't think they are a good fit for his practice). He obviously has no problem with (ethically) declining services or setting his fees as he chooses. So, if he does offer a discount then I would guess he is totally comfortable with it and he trusts you and the financial situation he is agreeing to.

Just my two cents anyway!