Nami might be shocked at first. She'd probably look at Luffy with wide eyes, not believing what she just heard. After all, Luffy is not the most romantic or traditional suitor.
Joy Boy in One Piece is a mysterious figure from the past. Not much is known for sure, but it's hinted that he had a significant role and left behind some sort of legacy.
Nami would probably be devastated. She has been with Luffy through so much, and his death would be a huge blow. She might become more withdrawn and serious, as Luffy was often the one to bring out her lighter side.
Nami would probably be shocked at first. She might worry about how this would affect Luffy's journey to become Pirate King. But then she would likely start thinking about practical things like how to take care of the baby on the ship. Sanji would be over the moon, seeing it as an opportunity to cook for a new little life. He might also be a bit jealous that it's Luffy and not him having a baby with Hancock.
Blackbeard's crew is also a diverse bunch. His more aggressive members like Burgess might be eager to start a fight with Luffy's crew. However, some of the more cunning members could be thinking of ways to use the situation to their advantage. They might try to manipulate Luffy or his crew into making mistakes. And if Blackbeard decides on a certain course of action, his crew would generally follow, but there could be some internal dissent depending on the situation.
The Straw Hat crew would probably be very surprised at first. Nami might worry about how Hancock's presence would affect their finances, since Hancock is used to a more luxurious lifestyle. Usopp would be in awe of Hancock's beauty and powers. Chopper would be excited to have Hancock around, as she could potentially teach him about different kinds of medicine from Amazon Lily. Zoro might be a bit skeptical at first but would come to accept it as long as Luffy was happy.
Well, the 'baby boy bundle of joy' is central to the Christmas story. Jesus, as the baby boy, was born in Bethlehem. His birth was prophesied long before. His presence was like a ray of hope in a world filled with darkness at that time. The shepherds were visited by angels to announce his birth, and later the wise men came to worship him. It's a story full of wonder and spiritual significance, and this baby boy was the very essence of that joyous event.
He could just laugh it off if it was all in good fun. Sometimes, showing that you don't take it too seriously can defuse the situation and keep things light - hearted.