I don't think so, I have a 6 inch cock and quite thick, my wife says it has never been an issue for her, but I love to share her with men a lot and she loves to be with many men and loves to get back to me and make love the way we do after having hot sex with her partners in crime...
We just understood from the beginning of engaging in multiple sex with men that it was going to excite and spice our marriage...
She has had about 35 different men, most were average as she calls them, some were amazing studs that filled every fantasy on her mind, I had the previlege to watch a few from a hidden spot and I loved the way she gave herself to all these men... even more the way they loved to have sex with her...