my wife and I have considered that possibility often over the past few years. I believe for us it's a difficult question to answer. my wife is a sexual submissive and part of her dominated fantasy is to be "black bred" to show her bedmate and master that he owns her as completely as I do .
we are in our late forties so the risk of pregnancy is small and at times we have gotten "carried away " and let fate decide . on occasion we have practiced unprotected sex as we "PLAYED" at breeding my wife.
in truth we would rather our relationship and activities remain discreet , yet IF an unexpected pregnancy did occur we would certainly keep the child. we would just have to deal with the fallout as best we can.
we have had two "scares " in the past where my wife thought she may have conceived . , thankfully they were both false alarms.
as for how my wife's bedmate feels I believe he'd love fathering a child especially knowing it would only strengthen the bond between my wife and himself. even though I have already given him my consent in sharing my wife and she already considers him a second "husband" .
I don't know if this helps answer your question about OPTION B but our answer already long thought out would be we would keep any child.