Theo could have explained the necessity of not leaving Ver alone when she was so fragile, of the fear of what she might do to herself if left alone. He'd seen her in crises before and she didn't handle them well, and with the children on the way he would not risk her - and their - health.
Not that he'd ever tell all that to Draco. He was fairly certain he wouldn't understand.
Draco,
Perhaps you are right, time will tell, for now they are here and the only people who know outside of this house are you and the healer you recommended. I think it's safe to say that you won't be talking to Rodolphus, I certainly hope discrete means that your healer won't either. There are enough spells on this place to make sure Rodolphus doesn't see a thing of what is going on inside the manor without popping in for a visit.
Either way, I have back-up plans. And I'll find out who it was.