Sending angry stuff will only make them believe stronger in Watchtowers false claim that all who leave are angry, bitter, unhappy.
Yet it could be a great opportunity to poke the bear a bit.
She wrote "I want to be able to do that with you in paradise. Get to know you and your family".
I'd definitely respond with something like "I'd love for you to spend some time with us and get to know us too! Good thing we can already do that today. You're kindly invited to [dinner at my place / phone call / whatever]. We're available [whatever date suits you]. Let me know if that date suits you too."