Far more important than toes not being out is if the angles of your joints are lining up. You mention being a short rider.
For example, if the person on this draft horse has to open her hip angle wide to sit on such a big horse, then in order to have proper body mechanics her knee must point out more and also her toes. That way the weight goes evenly through the joints without twisting or strain. This might mean she needs to take the spurs off.
Poor body mechanics involve twisting at the joints.
If your thighs can face forward on a particular horse in a particular saddle, then your knees and toes can too.
Some horses, particularly in saddles with wider twists cannot be ridden with your legs that close together if you have any width in your thighs. So you shouldn't try to put torque on your hips and knees to achieve a certain toe position, but rather let your weight flow evenly down your leg so it contacts the inner back of the thigh and upper calf, and then allow your hip/knee/toe to line up. The stirrup leathers or fenders should not angle forward or back, but go straight down to the ground.
On a narrow horse and taller rider, the knee may point forward more and the toes also. You don't want to try to roll your hips in on a wide horse just so your toes will point more forward.
Little guys will have more of an open leg.