I've posted this before as a comment, deciding to turn this into a post:

Escalation/LMR: Be pushy, be pushy as hell, but ramp up your pushy from "paw paw paw" to "We're having sex unless you say no". If she makes a calm/joking comment about you being pushy, yer doing it right and yer in... just say these words to her: "If you say 'stop', I'll stop." while continuing to make out with her. She will say stop right then and there. You will stop, you will calmly remove yourself from her (no snark, no bullshit, no deep sigh, no fucking reaction), and sit on the bed/couch next to her. Depending on how you read the girl, decide if you want to leave a hand on her in a neutral area (below the elbow or below the knee... and leave means just keep touching her, don't grab). If in any doubt, don't.

90% of the time: "Wow. You meant that. Come back here." Continue sexytime.

9% of the time: "You stopped?" Just give her the raised eyebrow inquisitive look or a simple leading "Well..." She will likely come around in the next 30 seconds.

1% of the time: "Thank god yer off of me" You totally misread some signal or she had an instant change of heart. Also quite possible that you have a case below that you read as joking/playful rather than panicked. Don't get mad, hang out for a few moments while she calms down. The one time this happened to me the convo was Me: "You alright?" "Yes." "You want me to head out?" "No, but we're not having sex tonight, ok?" "Ok." I followed up with a slow approach to her and more kissing. Kinda ended up being bad cuz about a half hour later she was asking me if she could change her mind about no sex, I told her no and that I needed to go. We did meet up two days later and that time she didn't complain about me being pushy (I did tone it down just a little) nor asked me to stop.

Of course, if she makes a panicked/angry comment about you being pushy, gives you a "no no no", or gets physically resistive: yer doing it too much. Pull off of her first and then give her the "If you say 'stop', I'll stop" line (and here I reverse my opinion about leaving a hand: if in doubt do leave a touch in order to be comforting). Success rates will be much lower than above. I've gotten 50/50 between "just slow down a bit" and "You need to leave". Again, if you get the latter don't be mad and do be polite; just realize you read something wrong and as long as you don't throw a fit there's a good chance you will get try #2. In fact, "It looks like I read something wrong. I apologize, you have a good night." is a great parting line for getting try #2.