Visitor Visa question..

[immihelp]

Sir,

My sister is planning on visiting us in the U.S., from India for a month. She will be applying for her visitor Visa soon. She will be paying for her return tickets herself . Since she will be staying with us for a month, I plan on sending her and the Consulate an invitation letter stating that I will be taking care of all her other expenses during her stay here including travel within the U.S.
Do I still have to send documents like the affidavit of support, my bank statements, employment letter etc.??

Your reply at the earliest will be greatly appreciated.

[immihelp]

If you are taking care of any of her expenses, you will have to send all those documents to prove that you can really do that.