Just watched replay. This was just a friendly kiss and I'm really pleased nothing intimate happened, especially since her and Miguel seem close again. My take on it is that she split with Miguel, briefly hooked up to this guy. I didn't see the original kiss after the meal, but sounds like she may have spent the following night at his. I'm not sure Miguel has his own place, that's why he comes round. Obviously she still really likes Miguel, probably more than she realised, and has got back with him. You could tell the way they were kissing passionately the night before, but she has remained friends with this bloke.
She's a free spirit and does what she wants, which is one of the things I love about her, so if she wanted to fuck this guy she would have. I'm glad she didn't though. Having said that, how the fuck could he keep his hands off her!....