Again with the hazy location! Africa is a giant continent! Please specify, localize, and/or characterize the type of human habitation (squalid Lagos slum; bushman settlement on edge of desert) you are talking about!
And you are wrong to make this about "Christianity." In Muslim societies, too - even where polygyny is actively practiced - loose women are not tolerated, and societal resources are not squandered on helping them raise their broods.
Same applies to 19th-century Japan, ancient Judea, and a variety of other civs.
Has nothing to do with Christianity or "the position of women in society." For most of human history, in the majority of societies, bastardy was reviled, and loose women were consistently punished.
Regards,
Central and southern Africa, small cities not major metropolitan areas. Traditional culture permeates.
It is well known and accepted that the extended family helps out with the ups and downs of life. That is just the way things work at this time - I am just an observer.
Why these observations appear to bother you is difficult to understand.