Of course you are, dear. I just love it when you pretend you're a big girl.

6 seconds sound clip from The New Adventures of Winnie the Pooh - Tigger Got Your Tongue? / A Bird in the Hand (S3E10).

You can hear this line at 00:14:59.000 in the Blu-ray version of the TV Series.

Quote context

[...]

- Rabbit certainly is glad Cassie's back.

- Yeah, but I don't think she's so glad about it.

- I believe that's because Rabbit hasn't noticed that Cassie isn't quite as... Cassie-like since she came back. She's grown up.

- Yes, Cassie, dear, it's going to be just like old times.

- I'm too old for old times. I'm grown up.

- Of course you are, dear. I just love it when you pretend you're a big girl.

- Now it's nappy time.

- But, Rabbit, I don't take naps anymore.

- Good night, Cassie, dear. Sleep well.

- Good night, Rabbit.

- I guess the only way to convince Rabbit I'm old enough to take care of myself is to go away and take care of myself.

[...]