Is this normal???!

What she did with her ex sounds pretty normal given the circumstances.  What you did was downright dishonest.

If her having sex with other men turns you on, tell her.  Don’t just get your rocks off secretly and leave her with a pile of needless guilt.  You should come clean with her so that the two of you have an opportunity to explore this together.  There is a chance to build a very good open relationship in which she is able to have other men in her life and you get the benefits of a sexual woman. 

Thanks for sharing that image of her; I can easily see why he took advantage of his time with her to spend as much of it inside her as he could. My question is why/how he became an ex that she still felt a sexual desire for..? When that happens it’s usually because the sex is great, but he’s lacking commitment or the empathy a woman looks for in a life partner. If you can be that life partner for her – that friend and partner – and still be supportive of her enjoying the male who pleasures her most in bed, you two could be well positioned for a hotwife/cuckold marriage.

The previous posters were correct: you need to talk to her about this and help her understand that your questions were less an interrogation and more of a desire to share in the experience with her. Sharing in it is what helps make it less threatening and enables you to enjoy the erotic aspect to what happened. If she were to do this again…or continue seeing her ex sexually, sharing it with you openly is the only way it can/should work.

That’s a strange one. Either she can happily spend a week with an ex as a friend. Or she can enjoy great sex. I can’t see how she could do both. Or why is he an ex? It’s not as if they had a holiday and ended up having sex after a night out. They had sex from day one.