Thanks for showing more of her... very, very nice! Next time she's excited during sex and you bring up the idea of her being fucked by another man and while she's hot she's all for it, tell her you're going to go ahead and arrange it. Next morning she might say she wasn't serious, in which case drop it for the time being and just keep working on it slowly. If she doesn't mention it - bingo!! You're in - go for it