Alien abduction of vampires?

An earlier comment mentioned abduction babies and hybrids. No matter who gets pregnant, it's never a hybrid if it's from an abduction. That's why males can get pregnant that way. It's not an insemination, but rather, the embryo is implanted. All abduction babies will be fully Alien. The only way to get a hybrid Alien is through "Try for Baby". However... Aliens and Vampires don't mix. Vampires can't turn Aliens and if they bred... I shudder to speculate. Bottom line, short of mods or cheats, both Life States can't exist on the same Sim. I wish it wasn't so. I'd love to have immortal Aliens. I get tired of having to Give them Potion of Youth all the time to keep them around. On a related note, if they can have Age Down Treats for pets, why can't they do the same for Sims? If someone becomes an elder before I can intervene, the only way to change them back is to use the cas.fulleditmode cheat and change their age in Create-A-Sim. Potion of Youth is a misnomer. It doesn't really make them younger. It only keeps them from getting older for a while. I think they should add items to freeze or reduce the age of individual Sims. Turning off aging messes with everyone, including children. I'd like to be able to freeze just my adult Aliens and let everyone else age normally.