Relationship between SafePerson and SafeTwitterAccount

[rajsenthil]

I came to this repo from the stackoverflow posting
Between SafePerson and SafeTwitterAccount , there is method calls in the order

1. SafeTwitterAccount.addFollower(SafePerson follower) => follower.startFollowingTwitter(this);
2. SafePerson.startFollowingTwitter(SafeTwitterAccount account) => account.addFollower(this);

will these not lead to an infinite loop?