Val, Lynn, and Sam are related to each other, but not incestuously (i.e. siblings do not create a child).
- Among the three are Valís father, Lynnís only daughter, and Samís sibling.
- Samís sibling is neither Valís father, nor Lynnís daughter.
Which one is a different gender from the other two?
Val(m) are Lynn's(m) children.<o:p></o:p>
Sam, the girl, is the diff. gender.