I don't know exactly why, but I'm starting to get the idea that Jessa doesn't like Ivy very much. Maybe a third kid was just too much for her. Maybe she dislikes girls and greatly prefers boys (not surprising, considering she was raised in a rigid patriarchy). Maybe she's following her mother's parenting style. Michelle, a indifferent mother at best, seems to have had no problem scapegoating some of her kids (Jana, Josiah) and openly favoring others (Josh, Josie). I hope I'm wrong because, if that's the case, Ivy is in for a miserable ride.