Hi Starsky,
it's hard to tell, It may be her personal reaction to it, and may have nothing to do with you having POIS. Iit may not do the same thing with another woman. There are known cases of semen allergy, and it is not related to POIS. What's surprising in POIS is that we react to our own semen, which is not supposed, because men do not react to their own semen. But it's possible that some woman can react to a specific man's semen, and this is known by medical science.