Chris' jaw dropped, almost sider than what Lana had to do to accommodate this strangers massive thick shaft. His eyes bulged in disbelief.  Sure Lana gave him a BJ, but usually after lots of begging or on his birthday, and then she almost seemed uninterested in it when she did suck him off. But here she was, with a fucking stranger and begging to have her throat fucked.  Never in a million years did Chris ever imagine his wife would act so, degrading or slutty.  He fantasized of it at times, but his fantasies were only PG in comparison to what he was witnessing.  He suddenly felt his own cock throbbing and subconsciously grabbed it through his pants, giving it a squeeze as he nosed the door open a little more and stepped inside the doorframe slightly, still out of site.  He held his breath, partially because he had lost the ability to breath seeing his wife submit to another man, and partially to avoid detection.  He HAD to confront her..but he just couldn't move, frozen still, in awe of her ability to take such an impressive cock so far into her mouth.