He convinces his sister to help him cum

Under the pretext of helping him cum, this guy manages to do something he had never done with his sister. First he tells him that he needs to ejaculate so that the eggs don't hurt and asks him to make a straw. As she does not run, the sister agrees to suck her and then she tells him to fuck her so she can unload her eggs at once. The fuck is intense and ends with an internal run that leaves the sister's pussy dripping with very hot milk with the risk of leaving her pregnant after releasing all the semen.