So, wait… she’s your ‘slave’ and you can’t even think of a single punishment for her?
Look don’t get me wrong, it’s absolutely fine to roleplay the idea of masters and slaves, but BOTH of you need to be clear that’s the situation. If you’re just pretending to know what you’re doing and she isn’t aware of that, then this can go bad, really fast.
If you have very little real experience, be honest about that. If you have the confidence and intelligence to convince some girl online to submit to you then the likelihood is you’ll actually have a lot of fun learning together. But do not pretend to be something you’re not. She is trusting herself to you, it’s one of the most amazing things a person can do for another, do NOT take advantage of it or you will be a complete asshole.
When I started out on this I never had to lie about how much I knew. I was always honest about it and given how few guys there were online who aren’t lying pervs just wanting to get off this was always well received. If it does matter to someone then they aren’t the right person for you anyway.
Don’t forget Uncle Ben’s advice:
As for your question, make her masturbate and alternate between smacking her pussy and rubbing her clit while she’s close to cumming. Then put her on on touch for the rest of the day.
Take it slow, focus on having fun, be honest, always put her first and don’t be an asshole. You’ll do great.