Wow! This is one of the best ruin videos I’ve seen in ages, although she doesn’t actually talk about it being ruined, that’s exactly what she does, stops stimulating him for nearly ten seconds before he actually cums.
Pretty good ‘dirty talk’ too, see how much of it is just describing what’s happening, it’s not very difficult!
The way I’d improve this is when he’s near, get him to beg to cum, and say no, I want to ruin you, beg to be ruined. And then as he gets really close, tell him how frustrating it will be for him and that that turns me on. But otherwise, this is really good!