Possessive Nouns as Indirect Objects?

In the sentence "I bought Susan croceries", "Susan" is apparently the indirect object.

If I now changed the sentence into:

"I bought Susan´s croceries", I obviously turned the simple noun "Susan" into a possessive noun.

I have two questions about this:

1. Can the possessive noun "Susan´s" still be considered an indirect object? And

2. if not, how does it have to be analyzed?

Thanks in advance for your answers.