The list below is my highly favorite preferences:
-Weight Gain Male/Female (Preferably Male)
Either it being magical, progressional, feederism (slob is fine, just not overly eccentric. Humiliation/Teasing would be part of this as well if desired), quick, or anything in relation.
-Rapid Female Pregnancy (Will not do male)
This can include through different means such as: alien impregnation, magical methods, scientific methods, or anything in relation.