I am already in deep water after having a fling with my aunt’s new husband – and now his son is blackmailing me into having s*x with him too.
I am 20, my aunt is 42 and her husband is 40. I found him attractive the first time we met at their engagement party but I never acted on my feelings. At a recent family get-together, we were laughing, joking and flirting.

He went outside to his car and I followed. He said he was glad I did, as that’s what he wanted. He needed petrol to drive some family home afterwards and asked if I wanted to go for a drive in his new car.
We drove out of town instead of to the garage. He parked up and kissed me, saying he’d wanted to all evening. We had s*x on the back seat. It was amazing. I didn’t let on he was my first lover and now we text all the time. He is romantic, funny, kind and sensitive.
I went to his house last weekend while my aunt was at her mum’s and we had s*x again. We talked about our future but decided to keep things as they are for the time being. He doesn’t want to upset my aunt and nor do I.
When I got home, his son texted, asking me to call his mobile. He said he “had something important to say to me”. I called and he said: “You didn’t see me but I walked in on you and Dad this afternoon. I know what’s going on.”
I begged him not to tell anyone. Then he said he understood what his dad saw in me, as he fancied me too. He said he’d keep quiet if I had s*x with him.
What do I do?
It’s just a bit of fun with his dad, though I can’t give him up. The last thing I want, though, is to ruin his marriage — and for my whole family to find out.