Hi nikisal,
Yes you can do it, as long as the S2S is created with a device on your inside and not on your outside the only thing you need to do is apply the crypto map on the interface you want to use:
http://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-next-generation-firewalls/119141-configure-asa-00.html
Hope this info helps!!
Rate if helps you!!
-JP-