Fusion of cultures
When a family decides to accept a girl from another culture, it cannot expect it to adopt everything from boy's culture. That would be nothing less than a love jihad - an expectation of a "conversion". Two cultures coming together is a beautiful moment. It's a fusion that will be born out of that union. Two cultures will bring practices and make new rituals. That's how hybrid variations of culture are born. That's how acceptance and tolerance find it's space. That's how our beliefs evolve, and we humans evolve.