Arroyo had one final test for Victoria before he put his faith in her. A Dragon is known for its overpowering willpower When one is swallowed instead of melded properly, it has a numerous detrimental effects, but the most immediate one is loss of self-control and unrestrained draconic shifting. However, there are some whose willpower is stronger than that of a Dragon. If she had not the willpower, she would have come with Arroyo when he offered ice cream, but when she overcame the Dragon's willpower and insisted on staying on task... He knew she had a chance.
A slim chance, but much better than nothing.
Good luck, Victoria. You will need it.