Cassie either got tired of treading or just made the excuse that she did, just so she could get a hold of him. He is used to it and has had to help Lori, but when he grabs Lori’s ass and feels her boobs against him, it does not have the same effect this did. She was not his wife, and she has bigger breasts and a bigger ass. He took her over to where they could reach the bottom. She used that excuse to hug him and try to act like she was saved by him, he knew she was a better swimmer than that. It was just an excuse to hug him naked and push her big breasts against him as she kissed him.
Despite the cold water he had adjusted to, he was starting to get hard, and her hard nipples still against him were making that worse. She got ahold of his ass when she felt his cock getting hard against her and pulled him to her and wrapped her legs around him trying to start something. She did not want to let go of him thinking she might get him to fuck her. It was working too, as he lost control for a few moments and was kissing her back as his cock was finding its way between her slit. She probably should have kept her mouth shut and just let things continue, as he was close to being past any self-control, but she didn’t.
Instead, she tried to talk him into taking her to the shore or even more shallow water to make love. Hearing her proposal made him aware of how close he was to losing self-control. He pushed her away using the excuse that he had to go back down while he still remembers the area around where he thought he could see her top, and he swam away for another try.
It took him another two to three-minute dive, that continued to work her up before coming up for air after he pinpointed it. She again was swimming toward him but he went down again to avoid her and get it. He retrieved it this time and took it back and she used that as an excuse to act like he just returned an irreplaceable ring with a large diamond and not just a pricey piece of cloth. She was all over him, he did his best not to respond. But he could not keep his cock from responding, and his resistance from weakening, and he let her talk him into applying some fresh sunscreen, and then demanding he let her return the favor.
Bill knew then he was likely going to have to use his pass and he was right. Why else would she avoid his groin like she was saving it for last other than not wanting to taste the sunscreen? It worked, between her using her hands in the area, and his focus on her naked body had him rock hard, and his cock standing straight up. She knew she had him, just had to set the hook in fishing terms, and just took it in her mouth. It worked, as he figured no man can be faulted for rejecting a blowjob from someone as hot as her when it was already in progress.
She was good, and the extra thrill he had from it being someone other than his spouse, and someone he had been lusting for made it all the better. She had a hand on his balls and was working his knob and shaft like an expert. Eventually, she was able to work her ass and pussy over as close to his face as possible without just straddling him and sitting on it. It worked it was tempting having her fine pussy in such close range, it made him review what the conditions of the pass were. The main no-no was to fuck her, and also not tell her about any oral. He used that as his excuse to help her put her leg over his head and eat her out. Now he had something to do as well, he had to at least return the favor.