This was already answered for you. The answer has not changed since then. No risk. There has to be penetration for any transmission whether she is positive or not. You can not get HIV from vigorous rubbing onto her anus. Even if you penetrated her, it would be less than 1 percent transmission (low risk) from a single event. And you didn't penetrate her so it is zero. You can't keep asking the same question, you must accept the answer.
No, she didn't turn out to be positive, there is no way you could convince her to get an HIV test. They meet individuals every day that confuse their emotion of guilt as anxiety of HIV infection. There are couple of good news for you, they practice safe sex, if they engage in commercial sex work and test periodically for their own safety. Also, you didn't engage in any thing that could lead to HIV infection. Please see a counselor to help you with your guilt. No risk, testing is not recommended.