No it is not possible that you penetrated her and you not know it..
Thanks RainLover. Call it paranoid. But i am convinced that somehow or other because her anus was lubed that I may have penetrated her by accident when she rubbed against me. She was pulling me towards her and brushing her anus against my dick. Would you know how deep the penis would have to be in the anus for risk to occur?
HIV is transmitted by;
Unprotected penetrative anal and/or vaginal sex
Sharing works with other IV drug abusers
Mother to child
There has to be penetration and you would have known if there was or not,from what you describe you had no risk.