Help me find this horror movie

this is a film that starts with a mother dying to some monster because her baby cried while she was hiding. Then cuts to a group of friends getting lost somewhere(probavly the place the mother died). The movie had multiple monsters though most of them dont appear and probably do in a sequel. The movie ends with one of the friends who was thought to be dead being captured by monster twins. If I can recall the friend group contains 2 couples and 2 of them cheat with each other.