>>18486181
your ass is mine

My trans gf gets upset with me because I slap, grab, and feel up my little sister's ass even though it's obviously just sibling banter. My gf says it's not banter and when I ask her how she, an only-child with an autism diagnosis, can tell she says she knows from my sister's giggles. How do I convince an autistic only-child that sibling banter is just harmless fun?