Hi, well done to both of you for getting to this stage i had vaginismus for years and it can be a real struggle to get there.
There are some really nice threads about it on the forum, if you have a search (top right hand corner, magnifying glass icon) that will have useful tips.
There is also the Positions of the week thread. Which has a ton of options, so maybe you’ll find one that works better for you.
These two might be good options to try as they give the penetrating partner more friction
i had vaginismus for years and it can be a real struggle to get there.