When I was dating my wife she would swallow no problem. Married 25+ years now, swallowing became less and less frequent and that's cool.
She'd swallow if I wanted but it wasn't important to me.
We got into mfm fun with a guy we know, we got more and more comfy each time.
One night they were messing around on the bed naked, he was on his back, she was giving him a blow job. He would always tell when he was close and she'd pull up and stop, they would kiss for a bit then he'd fuck her, it was how they had fun. This night he said he was getting close but she just stayed with it. He said he was going to cum and she had one hand on his balls, the other on the shaft and the head in her mouth. He grunted and she swallowed all of it. It was the hottest thing ever.
Since then she's swallowed his load a few times, my load many times. Wouldn't say it's her favorite thing but she will and does if asked.