Fanny's Futa Threesome - Semper Futanari, #4

Who's that girl in Fanny's bed?When Fanny comes home from class, there's a stranger in her dorm room! Pierced punk Angelica is friends with Fanny's nerdy roommate, Serena. Angelica wants to be more than just friends, but Serena's oblivious to the come-ons. Now Angelica's begging for a peek under Serena's skirt and she doesn't know what to do. Fanny and Serena have been fooling around since school started, but it's not like they've got an exclusive relationship.
When Angelica suggests a threesome, will Fanny have a fit or join Serena and the stranger in bed?