How to edge with fingers

I’m a male here, and my girl is really into the idea of orgasm denial, though she’s never tried it. We don’t have any toys, though we’re open to getting some, but we were going to use fingers until she decides this is something she wants to keep doing. I can make her orgasm with fingers, but my question is how can I bring her right to the edge, then bring her back down. When I can feel she’s about to cum should I stop with my fingers? Should I simply slow down, then speed back up after a while? Please let me know your favorite edging tips so I can edge my girl perfectly. female orgasm denial Get your own Orgasm Control toys: For men: http://www.amzn.to/1V6XQvv For women: https://ift.tt/1UWn54n