Games like Hotel Dusk do tend to have more female fans than male. If she likes that kind of game, then she'll probably enjoy Another Code/Trace Memory (made by the same people as Hotel Dusk) and the Ace Attorney series. Your location says you're in the UK, so she'll even get to play the Another Code sequel if she likes it. Lucky bastards.

Check up on a game called Again: Eye of Providence, she might be interested in that when it's released.