The crop factor applies to aperture in terms of depth of field. So, an 85mm f/1.4 lens when used on APS-C has the equivaslent focal length as 136mm on FF, and has the equivalent depth of field as f/2 on FF. That applies for the same framing as FF, and the reason for the apparent effect on DoF is that to get the same framing on APS-C, you're further from the subject, meaning a deeper DoF. Sensor size does not affect exposure, so your f/1.4 lens on APS-C is giving your the shutter speed of f/1.4, not f/2.