I still don't get it because you are still not being specific. I believe you might mean that, during the start of Morgan's quest to fuck his mother, you are at home in the room to the left of the living room at night where your father is in the upper left corner and your mother is sitting at the table with the computer. You have to speak with your father about going to visit Morgan's father. There is plenty of room to get around Maria before and after you talk with your father.
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If this is your situation, how is Maria in your way? There is plenty of room to go around her and she does not move from that spot.