Small head on that big dick. Would make it easy to slowly slide it up my ass.
My mother in law can do that quite well.
She's great, but he has a dick perfect for deepthroating while on your knees. It arcs just right for the throat. I'd love to take it done MY throat tue what you said below, once she forces the cock down her throat, it gets easier, practice makes perfect. Sucking cock is FUN!
Put your girl on the end of the bed with her head hanging off the edge and then stick your cock down her throat, hard, and it should push through that barrier. She'll get use to it. Then she can do this in a while.