I agree with the on your side thing, my missus likes it as she has arthritis and dont cause any pain. Also it feels good as you can easily slide in and out, pull your head all the way out and then back in, you get more contact on the head as her lips expand and contract around it. She likes the feeling too.
You could also, dont know how she'll take it though, ask the missus to squeeze her pc's, that'll make the whole thing tighter and better for you.
Me cocks as god intended it, uncut.