i have a pair of emps, i clearly identified which is the male and the female. But the problem is, they won't mate when i try? the female pushes the male away when the male tries to grab the female's pedipalps. and i noticed, the female is the same size as the male. is this normal? or the female is not yet mature? btw i sexed them thru their operculum or whats that called. males have oblong shaped while females are heart shaped right?