Drunk teenager slept with cousin at family wedding before discovering who she was

On May 3rd, The Mirror had an article about romance at a family wedding:

“A girl I don’t recognise begins to dance with me on the very crowded dance floor. She’s older than me clearly, but I thought maybe 19 or 20. Anyway, we start dancing, touching, etc. She twerks on me a little, I grind a bit and I presume nobody noticed due to accumulated intoxication and crowdedness around where we were.

“One thing leads to another, we start kissing and she asks me if I want to go ‘upstairs’, which I correctly take to mean her room in the hotel (it was a hotel wedding). I, of course, being a hormonal teenage boy, jump at the opportunity and say yes. I should say this wasn’t my first time or anything and by this point, I carried condoms around in my wallet when I went out and knew I would be drinking.

“So we proceed to discreetly (or so I think) take our leave. Both are drunk, obviously, but not to the point of not being in control of our actions, or stumbling around/blackout etc. I get to her room, a bit of excited talk, and clothes come off. All is going well. Now, I should say that all this time I’m assuming this girl is a relative or perhaps a friend of the bride, but oh boy. I was in for a shock. Because, as it turns out, she thought the same of me.

“As we were ‘cleaning up’, so to speak, we began a little small talk when before had mostly just been purely sexual. She eventually asks how I know the bride. I stop. Thunderstruck. The realisation slowly creeping up on me and oh, the horror. I laugh it off, hoping, in vain, she is joking and state I am the son of (insert mother's name).

“The shock is palpable on, what I then realised, was my cousin's face as she was putting her bra back on. She sort of freaks out and says she’s the estranged daughter of one of my uncles who’s had a troubled life, whom she had very recently reconnected with.