Make her squat over a cone-shaped toy which is a little bit too large for her hole. After a while she has to decide whether she wants to spare her leg muscles or her hole (like in this porn but with the other hole).
I already tried Tabasco instead of lube on a glass dildo - nice burning...
I like the idea of being able to inspect all the holes and udders in a single picture. For example, put your phone with self-timer on the floor, stand over it with your legs spread, pull your buttocks apart with your hands and bend forward so that you can see your open mouth and your pussy and...
I'd rather call that a "cute" gape, nothing to worry about.
Gapes usually don't occur and persist after inserting large objects or DVP. So if she doesn't stretch on her own and if you don't play with her that often, it could be natural/genetic.
Why don't you just ask her whether she used large...
subzzzero already gave so many ideas, maybe I can contribute to the clothespins stretching issue:
Put a clothespin on an outer labium, then attach an empty bottle/cup/... to the clothespin. If the clothespin comes off already, attach one or more rubber bands on the outside of the clothespin, so...
If you're still available, please send me a PM! :)
I'm into fitness/endurance, pain tolerance, 4-hole training, orgasm control, predicament bondage, nipple/tits/clit torture, commanding, ...
difficult without knowing your limits and available utensils...
You could put clothespins on your labia and clit hood, then attach an empty bottle to the clothespins. Stand in your shower/tub with spread legs and fill water in the bottle until the clothespins come off.
If you really want it wild...