One of the rules I established within this series is that the game girls are still confined to the stories in their games. In the case of pregnancy, they can't have any children unless their game says so. So the guy are free to cum inside them all they want without worries about getting pregnant.

A good example would be Mai Shiranui. The only way she'll ever have a kid is if say... King of Fighter 14 says she has a new son or whatever. Even so, SNK would say the father is Andy Bogard... not Joe sinister or anybody else.