The thing about women that fuck themselves with their fingers like this or use a dildo instead of just rubbing the clit is they learn to cum from vagina and not just clit. Yes she rubbed it some but she needs her pussy open and stimulated. So what I am saying is I think they cum better from just a cock and not need extra clit rub to get off. Of course everyone if diff about what feels good but I bet she don't have trouble cumming with a man as long as he don't nut too soon.