My drunken older sister's pantyhose-clad, shapely buttocks pressed against my face! HUNTB-527

My older sister is a talented career woman, but her biggest flaw is her alcoholism! It's normal for me to take care of her when she comes home drunk… but today, when I was carrying her home drunk, she collapsed on top of me! My sister was so drunk she didn't realize it; her skirt gradually lifted up, revealing her pantyhose and buttocks, and she sat on my face. And I actually got an erection! Moreover, when my sister woke up and saw my erect penis in front of her, she wasn't angry at all; instead, she gradually became excited…