You may live in the west, be fairly liberal and think all that religious stuff is old gen but often different cultures don't live by western standards and stick to their archaic rules. I dated a girl for a few years from a different culture, she was too scared to tell her dad and said she would get disowned by her family.. so what to do... anyway didnt end well as i wanted to settle. A year later after we broke up she was dating someone from her culture, she calls me crying and says shes pregnant and wish she had just not given a fuck about what her family thought, fuked me up quite bad tbh like.
Try get a feel of the her familly, if you think you will never get accepted, then better to walk now, you'll find someone else.
Well it clearly is affecting their relationship otherwise OP wouldn't be posting. They are currently having to live on edge and hide their relationship, that will have negativr effects, can't go into the family home, maybe evenfear of being recognized in public. Its not a dick move to leave the relationship, its self preservation and can hve mental effects continuing on such a path.