Choose the correct forms of the verbs

James is sure he can buy something extraordinary in the American art gallery. He likes a painting by a well-known artist and he [will|is going to buy] it. As it costs him a lot, he is sure it's a fine piece of art. Tomorrow at this time, he [is going to present|will be presenting] it to his fiancée. Amanda is a true art lover. She [will|is going to] like this painting and [will|will be] say "yes" to James' proposal. After that, they [are going to|will] get married. And next month they [will be enjoying|will enjoy] their honeymoon in the Maldives. They [are going to be|will] always be together and happy. But what if she understands that the painting is fake?