That’s not true. Jesus never said angels were incapable of reproducing.
In Matthew 22:30, He said that in the resurrection people “neither marry nor are given in marriage, but are like the angels in heaven.” That’s about human relationships after death, not angelic biology. He was describing that angels in heaven don’t marry—not that they can’t reproduce or never have. In fact, Genesis 6 and supporting passages in Jude 1:6-7 and 2 Peter 2:4 have long been understood to describe fallen angels who did exactly that.
I am sorry but there is nothing that supports your idea about Angels, fallen or otherwise having sex lives or reproducing.
I know that as a human with sex and reproduction being such a big part of our lives that it is hard to consider a spirit being that does not but that seems to be the way He made them.
I will note in both places it references Sodom. As the destruction of Sodom was after the flood and you are apparently using their wickedness as some proof that these mythical hybrids existed God either missed some or fallen angels are still having sex with human women and reproducing.
Which one is it?