What made her decide to give a party in Loona Bimberton's honour And What did she intend to give Loona on her birthday

What made her decide to give a party in

Loona Bimberton's honour And What did she intend to give Loona on her birthday? 

Answer: Mrs. Packletide manipulated a party in Loona Bimberton's honour for having killed a tiger.

Very shrudely she had planned that she would herself kill a tiger before that and reveal this fact at the lunch party.

For Loona's birthday, she intended to present her a tiger claw brooch. All her intentions were directed towards outshining her rival Loona Bimberton.