Dog.

From Create Your Own Story

The zookeeper takes you to an area of the stable that looks like a kennel. Dogs of all sizes in cages of all sizes line the walls. The zookeeper tells you that he has dogs trained for all sorts or tasks and asks you what you're interested in.

Have a dog lick Lily's pussy.

Have a dog fuck Lily.

Have Lily go down on a dog.

Fuck a dog.

Have a dog fuck you.

Go to the Zoo. (see what other animals are available)

Ask Lily to take you somewhere else.