He was on top of her, so he has to be the one in control of the kissing now. He was still making use of his right hand to squeeze her boobs while kissing her.
But that ended after the passing of a few more seconds, which led to him focusing more on kissing her. They kissed for a few more seconds before their lips separated from each other.
Then Ryan began loosening the part of her clothe where her boobs were situated. Yes, he wanted to loosen it so he'd be able to see her boobs properly, then suck them.
And he wasn't doing so slowly, he was doing so hastily. He wanted to begin sucking them as fast as possible, so he couldn't afford to be loosening that part of her clothe sluggishly.
He'd finished loosening that part of her clothe as he could see her boobs properly now. He wasn't squeezing the main boobs when he was doing so and kissing her at the same time, he was squeezing them beneath the cloth.