Even if your spouse is a EU citizen, if you are going on tourist Visa you need to submit all the documents required in the visa application.

Its easy to get it through German Embassy, it will take only 2 days.

You can get an invitation letter from your spouse's family there.

You will need travel insurance for the duration of stay.

You will need a letter from your employer.

Dunno if bank statement is mandatory in this case..

The lady there is very helpful, its better to visit the Embassy and clarify..