Relative Recruiter not adjusting pregAdaptation properly

Similar to #3085 (closed), please label as a bug. (What role would I need to have permission to tag my own issues, anyway?)

Several 18+yo slaves of mine have recruited younger sisters under 18, and they always have a pregAdaptation rating of 50, the adult default, despite being potentially much younger than that.

Would we be able to just add calls to the generateXX/XYPregAdaptation functions from generateNewSlaveJS.js to generateRelatedSlave.js, or do those functions only work in their home file?