I may be wrong, but wasn’t it someone other than a Spartan who sacrificed his daughter (Iphegenia sp?)before the departure to Troy (Agamemnon?). I believe this was a motive for his wife to destroy him.
His wife was an adulteress and gold-digger.
Agamemnon didn’t want to make amends with Diana (the Greeks were being kept from departure for Troy) and balked at the sacrifice, so Odysseus cooked up a deception. It’s a story with a lot of variations which probably reflect the otherwise obscured theological struggles of classical Greeks. In one version she isn’t willing to be sacrificed and her mouth is stuffed with cloth to keep her from hurling a last-minute curse on her own family. In another, she’s spirited away to become a priestess of Diana just before she’s sacrificed.
http://www.stanford.edu/~plomio/iphigenia.html