My mistress x

Just recently my relationship with my girlfriend has taken a massive turn for the better.
A while ago we had had a few drinks and started talking about fantasies, she told me that she wanted to fuck me with a strap on, I was shocked, buy absolutely delighted, as for quite some time I have been dressing as a woman and dildoing my sissy hole when I am alone.
We purchased a strap on and tried it out, I liked it, but the dildo wasn't as big as the one I regularly used, so I lied to my girlfriend and told her that I had bought a new one and gave her the dildo that I had hidden.
She fucks me with it a few times a week, but the last time she slept over, she woke up and told me that she'd had a dream, that we were in some woods and we were both being fucked from behind by men while we faced each other, she also said that in her dream I was fully dressed as a woman and that I was calling her Mistress.
This got her REALLY horny, so tomorrow night, she wants me to dress as a woman, she is even going to do my make up and bring a wig she has at home.
I can't wait xxx