I stood up and took a step toward her. 'We could try it, right? I mean we know each other and love each other, right? We feel safe with each other---'

She interrupted. 'We could just try that, just that alone...it wouldn't be like we were having sex, or anything...Should we? It's just my butt, it's not my...vagina. Would it be OK? I mean would it be wrong?'

Wrong shmong! I couldn't find a single thing wrong with this. I didn't ever want to do anything to hurt my sister. We were both obviously horny as hell and willing to help each other out of this sexual curiosity thing. In...