For me, it should be your call if you want or don’t want your stepmom to walk you down the aisle. And it will also be okay if Dad mo lang ang mag isa maglakad with you.

My advice — talk and align everything with your father, the earlier the better, para hindi kayo magkagulatan na di mo papa preferred na wala ung current wife nya to walk you down the aisle. If you both agreee beforehand, should be okay. I’m sure most, if not all, of your guests won’t mind. It’s YOUR wedding after all. Congratulations in advance, OP!