Put your hands together flat, palms touching, and place the outer edge between her cheeks, over her anus and perineum. As your partner relaxes, they might be ready for a second or even a third finger. Do that for seconds. Tell her to breathe deeply, to relax and to focus on contracting and releasing the pelvic muscles, in particular those in her anus. Rest here and let her adjust to this new and different sensation. Slowly slide the first one out, get some lubricant on both fingers, and then slide back in. You can begin to make come hither motions with your finger immediately, or wait until your other hand is in position.
You can still do a lot with a single finger.
8 Naughty Anal Fingering Techniques
Take a look at them, and keep in mind that all the prep that you need for anal sex is also needed for anal fingering. It can be tempting to speed up at this point but hold off on that. You can vibrate your hand to create a sensation like a vibrator. Get some lubricant on your finger, all the way down to the base before you begin to penetrate. Also, if you manage to give her an anal orgasm with your fingers, she will be more open and relaxed to let your penis get in, and once it is inside of her anal canal, some other great orgasmic sensations are possible! Tell her to breathe deeply, to relax and to focus on contracting and releasing the pelvic muscles, in particular those in her anus.