I am certain IF she does become pregnant because of this, the agency would most likely contact him. IF they are aware of anything that he needs to know. OR, they might not get involved at all. It isn't in the agencies best interest for a companion to get knocked up by a client, but women come and go ALL the time and it really becomes her decision on what SHE wants to do. Shit happens. However she ALSO would be potentially signing up for a lifelong commitment, which based on her moral stance on birth control...says something. Certainly wouldn't be worth the money you paid her for her time, to walk away with a child.
As a companion, this would be my worst nightmare.
Until you know, I am SURE getting overly involved in any sort of emotional interaction/reaction when a pregnancy at this point is possible, but not confirmed- is useless.
I think the idea behind this thread is something anyone should ponder, as there's real consequences at times for momentary pleasure- but this isn't new. However, the unique part of this scenario would be her unwillingness to take plan B (which isn't always sperm proof anyways) and the possibility as a client, you got a companion pregnant who has already stated she doesn't believe in abortion.
I'd dig deep within yourself and ask yourself what type of man are you... one that WILL do the right thing, if necessary, or the guy who goes and sticks his head in the mud. If you rationally reach out to the agency and extend the ability to ensure there is communication, they can atleast contact you.
The fact you discussed it here, tells me you have some self reflection, insight and aren't like the majority of people who chime in to give their opinion. At the end of the day, the peanut gallery is not the one who has to live your life, you are.