lol that's too funny. I did something similar when I lived with my dad. I wanted to adopt Fallon so bad that I told him I was going to be fostering this little cat and she wouldn't be staying with me long and as soon as she found a home she'd be going.
He was kind of reluctant and a bit wise to it since I pulled something similar when I got my Iguana. He told me I couldn't have an Iguana so when he went away for vacation and came back there was the Iguana. I told him Brian bought him for me for valentine's day and I couldn't give him back.
Needless to say He let me take Fallon in and kept the Iguana. I'm sure he's glad we're all out of his house now.