Wives ex has a very deep voice so I can only assume he's big. She's told me she never orgasmed with him.
We met after she was divorced, I know she kinda sowed her wild oats after they split. We start dating and having sex, one night I'm licking her, she starts to cum HARD. After she told me she never had an orgasm befor. Oral became a regular part of our sex. She always came from oral but never from me pumping her.
About 4 years ago we get into mfm fun with a guy we know. I'm 6+ he's 8+. He must be the prefict size for her, she cums no problem when he fucks her.
Always a similar deal, they start off kissing, making out, some oral on each other, he fucks her in several positions. They're pretty in tune to each other now, he has her on her back, he mounts up, starts to really pump, she has her legs straight down. In about 30 seconds she's cumming hard, her whole body gets stiff, that gets him off. It's damn hot to watch.
There's been times she cums while she's on top of him sitting upright.
Many nights when he's with us she cums 2 or 3 times, first from one of us licking her, 2nd from him fucking her, 3rd from me or him pumping her later on. She has never cum from me pumping her other than nights he's with us and he's got her off first.
It seems his dick is her preferred size and shape. And I will admit he looks hot standing there with a full hard on.