Maybe I'm missing something, but did she say she's uncomfortable because you are disgusting? If she didn't say this specifically, but articulated other reasons such as she doubts its therapeutic nature, are you assuming that she really thinks you are disgusting, but won't say it? To me her being willing to continue to hold you sometimes speaks to her commitment to you rather than her own comfort, and seems like a good thing. Sometimes people are willing to do things they aren't crazy about for the sake of the person on the other side of the relationship (like in a long term relationship, compromising or what not). It's a gesture of love and support.

But just like in another thread, you can't control not only what someone does, but how they feel about it. That she feels uncomfortable with it is because of her and her role as a therapist, not because of you (unless she said differently). I'd be kind of worried if her reaction to holding you was "I love it! It's the best thing in the world! I wish I could hold you all day, every day!" I understand the need for safe touch, but it seems to me as an outsider than you've received it and she's offered to continue to provide safe touch, but within limits. This is similar to relationships of all kinds.