Strange Question - Need Answer

Okay, here goes. I know this is very bizarre, and probably stupid, but my brother asked me to get some info for him. His girlfriend is trying to rehab, and has quit smoking p. He continues to smoke p excessively. She gives him excessive oral sex. She is testing positive for p. Is it possible to transmit THC through semen, and if so, if the semen is ingested, will it show up on a drug test?

I know what you're thinking, but this really is for my brother, the little shit :mad:

All she need is more time to clean out, not less seman. She is not testing possitive because of her oral activities.
Hope that helps.
N2