In Texas, there is a 2 year age difference clause. So, the consent issue only comes into play when one is under the age of consent AND there is a greater than 2 year age difference. In this case (15 & 17), the issue of consent based on age would not apply. However, Texas also states that an intoxicated person can not consent -- giving them the basis for the date rape cases. If they got her drunk or drugged her, there could not be consent.
She drank alot on her own and engaged in sex. The jury didn’t see it as rape.