Aunt Rachel

We always go around to my aunts on boxing day. Last year was no exception.
What was different, was my mum getting legless and my aunt Rachel walking into the lounge naked and offering me her pussy.
She said something about me losing my virginity and being my present.
Looking round at my mother, she was flaked out on the chair, so I took my rock hard dick out.
When I fucked my aunt, and she was a fantastic fuck enjoying taking my cock in all of her holes, I didn't tell her that I wasn't a virgin and who I'd been fucking for the past eighteen months.
I didn't tell her, because the beautiful girl I'd been having the most amazing sexual time with, is her daughter, my cousin, Ellie. Who was visiting and staying over at her dads (Parents are divorced).
To my utter surprise btw, thinking it was because Rachel had drunk too much, it's not just been a one off.
Rachel went down on me in her kitchen yesterday and had me fuck her from behind as she leaned over the worktop. I finished off up her arsehole making us both cum.
Telling me afterwards I coud call around anytime for sex, I didn't have the balls to tell her that I'm fucking her daughter as well.
Now I don't know what to do.