How can I make this text wrap effect?

[cream__soda]

When I try to do this in the text wrap window, the phrase on the right is also affected by the rectangle I applied and I can't fit it in that space. 

[jmlevy]

When I try to do this in the text wrap window, the phrase on the right is also affected by the rectangle I applied

You don't need any additional rectangle. You just need to apply the text wrap on the right frame. See my sample file attached.

[Gord@APL]

@jmlevy's advice is the ideal solution for the sake of document tidiness. However, if you go into Object > Text Frame Options... for the box on the right, you can switch on the 'Ignore Text Wrap' option for the same result.