I see this question asked a lot and I think the answer is obvious: don't push past LMR.

Let's imagine a scenario. You have three plates: A,B, and C. A and B let you fuck them all day, but C says she "isn't ready" for sex, though she pleases you manually and orally frequently. A lot of people here would ask how to push past C's LMR, but this is what I would recommend instead:

Ask yourself, would you be okay with never having sex with C? You already get some sexual satisfaction from her, but is it enough? If the answer is no, next her. You already have two other plates to fuck. You don't have oneitis, you don't need her, leave her behind.

If the answer is yes, and you will be satisfied with what she's providing, tell her it is completely fine and never try to fuck her again. Ever. Don't even bring it up.

This may seem counterintuitive, but think about what a beta would do in this situation. Imagine a beta with C: C is his only hope for getting laid, C is his life, C is everything. When C rejects the beta, he's going to be crushed. He's going to do everything to try to change her mind, because he has no other hope of getting fucked. And to C, it's going to be completely obvious, and she's going to be both turned off and creeped out. Don't be like that. You aren't a beta. You have other options. Act like it.

Once you establish that you are okay with her LMR and put sex completely out of this picture, you may actually start to push past her LMR. The fact that you aren't on your knees begging to be fucked will be enough to intrigue almost any woman. Women want what they can't have. Be what they can't have, and they will want you. Make them work for it. Tease them endlessly until the only resistance from what they want is you. You may never get past the LMR, but she will respect you more for not being butthurt and worshipping her pussy like every other desperate beta does.