I remember the first time I edged a partner. We were laying in bed together, her curled up on my left. She had her right arm under my neck. I took my left hand and reached behind her neck and grabbed her left wrist. So now my head and one hand were controlling her upper body. I wrapped my two legs around hers and pulled her legs wide apart. (I wrestled in college so this all made sense.)
I had her completely immobilized and still had my right hand free to play with her body. I started by gently stroking her nipples, been bringing my fingers up to her lips. I played with her mouth for a while and took my wet hands back down to her nipples, gently teasing them.
Slowly I started to apply more pressure until she got squirmy and it was just on this side of being too painful for her. At that point, I started to reach down between her legs. We had had sex earlier, but she was getting wet all over again. I started alternating between playing with her clit and fingering her.
As soon as she would start to get really into one, I would switch to the other. I wasn't doing this with any intention other than just being a brat. Nobody had ever heard of edging back then. I was just proving that I had complete control over her.
In time, the interval between switching back and forth between the two kept getting shorter and shorter. It took less and less strokes in each area before she started really getting into it. Eventually, I slid my middle and ring finger into her pussy and used my thumb on her clit. In short order, she was straining and pulling against my hands and my legs.
There was no way she was going to get away. She could barely even move her hips because of the way I had her legs pinned. We had been together often enough that I knew how her breathing changed as orgasm approached, so when she got to that point, I stopped.