So my fiancé has twin sisters,but only half sisters. His father was with a different woman than his mother when he had the twins,I'm not sure if the twin genetics come from his father or the twins' mother.. I want twins even if my fiancé doesn't have that in his genetics.. Is there any type of way I could bring my chances of becoming pregnant with twins higher? Any type of foods or treatments or anything?!?! Help?!??! Thanks!