RewriteEngine on
RewriteCond %{HTTP_REFERER} http://(www\.)?besthardcore.net(/)?.*$ [NC]
RewriteRule .* - [F]
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http://(www\.)?sensual-ladies.com(/)?.*$ [NC]
RewriteCond %{HTTP_REFERER} !^http://(www\.)?catyxxx.com(/)?.*$ [NC]
RewriteRule .*\.(gif|jpg|jpeg|bmp)$
http://www.sensual-ladies.com [R,NC]