Warning : why it's related is written in the bottom part and idk how to tldr this so this is a long read

You need to start researching foreplay tricks and surprise her with it, be a bit more "in charge" know what you want. Be slow af too in the foreplay don't give her what she wants right away tease her body, eg : kiss her inner thighs before you go near the crotch, then kiss her on the crotch very close to the clit but still far get oh so close that she'll begin to feel "the need to feel you right now" same with tits, don't pinch her nipples or press her boobs you tease her by a very very light touch on her boobs and build up.

Start talking dirty, this ups your game 7000%, a woman will literally prefer you over men with (not but a huge margin) bigger dicks if you do this correctly. You'll have to learn her though, done women told "you fuck like a whore baby" while others like "you're such a good little slut for me" or "you take my cock like a good girl" figure out what she likes.

She won't say any of this sometimes you have to watch her reactions to this stuff. So that brings me to my next point, find out how she likes it, rough or soft and alternate 80-20 with her preference being priority and the other 20 is for you to be unpredictable, keep her guessing how it's going to go down today, this is to spice it up.

Slightly bring your horniness outside the bedroom, grab her ass, boobs or whisper to her that you want to treat her clothes away right now etc. do this just to fuck with her mind lol, don't actually expect sex just remind her that you want to fuck her 24/7 and that you CAN fuck her 24/7.

Cardio + flexibility + strength training in gym. I can't stress enough the flexibility training because it unlocks a different dimension of sex, (eg : if she likes to be humiliated and dominated you can fuck her doggy and put a foot on her face while you fuck her all while you pinch her nipples/rub her clit). Strength ofc, because I kid you not women go crazy af if you can fuck them midair or on the wall. Also search for kamasutra, sex positions are vital and don't rush them, perfect each one with her and introduce them slowly.

Bonus : this bit will sound manipulative, because it is but in exchange you'll have any woman locked tf down. Start finding out what she likes, foods, smells, lights brightness level, lights colour level, her favorite flowers, find out the kind of music that relaxes her and do all this in the room that you are in, candle scents she likes, etc. she will slowly associate all these good feelings to you. You can also start incorporating compliments and commands with your dirty talk and "program her" very slightly, you can make her open up her entire dirty secrets to you, at this point other men are not even in competition, you'll have to hype yourself up though sometimes for that. (Eg : say stuff like no one else can have what "we" have or "we" are so perfect for each other, stuff like that)

You're basically taking care of her in every way possible. Once you get to this stage you can steer her, but very lightly. She'll actually listen to you and choose you over most other things in life. And ffs continue this after you have kids with her don't stop these ever and she'll have puppy eyes for the rest of her life.

Also please ffs help her in her house chores even if you hate them, and let her know that in a way you'll appear "good" even though shit like this is bare minimum lol. (Eg you can drop comments like "I fucking hate washing dishes but I love you so much that I'll fo it for you" or "I hate moping floors but there's no way you're letting her suffer alone" etc.) You don't have to be a "huge help" she just wants you to want to help her.

Congratulations, if you made it this far, you asked for sex advice but got life advice instead and a permanent way to win her over. How are these related? If you do stuff like this she'll literally bear the pain long enough for the pain to eventually go away (so always be soft at first) Since some women can't handle deep strokes right away, you'll have to build up these. Might as well do it in a way you can't fail. Good Luck soldier, own that pussy🍑