@GoblinGuy: frankly, after Peter Grill, my eyebrow stopped batting from over-batting.
Besides, why not? It they remain on good term with him, they can either:
1. Be greedy and expect even more amazing gifts in the future.
2. Be...hmmm, what's the word? And consider that his child would likely also be super strong.
3. Gain an OP party member (even if he's not a permanent member, just being able to call on him when chances arises would make jobs easier)
There's no reason not to try and keep connections with him.