I didn't think Gambit was bantering, so much as literally telling Wade to stop killing people. But, even if he didn't seem that horrified, he dated and then was married to an assassin....
I doubt he's too shocked that an assassin is going to assassin.
Deathbird was pregnant. Did she lay an egg, or give birth to a live Deathbaby? To me, at least, the pregnancy suggests that she did not lay an egg.
But, apparently, many Shi'ar do lay eggs and those eggs are raised in a special chamber on Chandilar.
shiar00-nest.jpg
(This is from Uncanny #344)
She needs Lilandra's child to bolster her claim. It's the Lilandra connection that's important.
I included it for you. Haha.