Prevent executing .htaccess of parent folder

Question

Hello
I have two different sites on same domain for example:
First site in the root directory http://example.com/
Second site in subfolder http://example.com/site2/
Each site have his own .htaccess
When i enter to second site (http://example.com/site2/), in log of mod_rewrite i see that apache trying to execute .htaccess of first site (http://example.com/).
So, the question is how to prevent this? Thanks