Wow, that makes me grateful that Rafe is weaning himself. He'll go out and hang out with the horses in the pasture most of the day and sometimes return to mom to nurse but mostly lives on the hay everyone else eats. Too bad you don't have an old herd leader gelding that you could put Lexi with. The best thing I could have done for Rafe was put Dobe out there with him. Talk about learning some manners. After all the hair grew back, he is much more respectful of everyone, including me. Dobe even tackled him once when he got a little too disrespectful.
That's good that you are weaning her, both her and momma will be much better off and momma will be happier. You might consider keeping her, by the time she is really old enough to start riding, your situation may be better and you'll have enough time to mess with her.