yehuborim are yehuborim and Gentiles are Gentiles. They themselves brag about this all day. If there is any jewish blood then they have a jewish soul. We can see this with how jewish the child ends up looking.
They themselves look down at mixed yehuborim and consider them useful idiots.
The above with many cases where the jewish parent leaves the child with their gentile parent. At best they send money from afar.
Then their child will become Jewish, and be grouped with their parents who are also Jewish, and knowing that a Gentile is having sex with a Jew, then that person is no longer part of the non-Jewish group
A Gentile that had sex with a jew is still a Gentile. Their aura will be polluted however so they’ll need to clean thoroughly, although a Zevist would never find themselves in such a situation, unless done by accident and they were unaware that it was a jew.