Yep, this isn't a training issue about house breaking...she's sending a message with the "protest poops" (I like that
), and I don't really think it's a "marking the territory" thing either (or at least all dogs I've been around do so with urine). When the visiting dog leaves (how much longer?), the problem will correct itself. In the meantime I'd probably "crate her" to avoid the "wrath of wifey", since it seems that one more time will do that, and I wouldn't want to take any chances
.