Yeah. Rumple knew of the risk but Hades hadn’t quite worked it out yet at that point. He may not have realized the contract could be enforced, but he knew Belle was pregnant…and the way he tried to gather up the shards of the ball, I think he realized that Hades could work it out, too.
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Keeper of Belle's Gold magic, sand dollar, cloaks, purple FTL outfit, spell scroll, library key, copy of Romeo and Juliet, and cry-muffling pillow, Rumple's doll, overcoat, and strength, and The Timeline. My spreadsheet: https://drive.google.com/file/d/0B6r8CySCCWd9R0RUNm4xR3RhMEU/view?usp=sharing