My step sis, I watched her grow up and we are super close, she benefits from me and becomes a lot closer to islam as I try my best to guide her. If i stopped hanging out with her it would be a huge catastrophy in my family as we live together, I love her so much (as sister) wallahi what do i do ?

Ustadh AbdulAziz al-Haqqan

A step sister who is connected to you only through a parent's marriage, with no blood relation and no shared breastfeeding, is not a mahram.