A Number of Incest RP Ideas

I might elaborate or add more later, but I wanted to get this out before going out for a little while.

I could play either character in these.  If I am playing the male, a woman playing the woman would be a plus, but isn't necessary.  In all cases I am thinking 'sex heavy' but with larger stories mixed in.  Age wise I am leaning for 18 or slightly older [Additional Information Removed by Staff: Section 17.4 Violation].  Being into breeding/pregnancy is not required but a big plus.

Brother/Sister - Modern Setting:

This idea is a taboo form of cheating.  The sister has recently got a boyfriend, they have gone out, may have kissed or groped a little or lightly fooled around but not had actual sex yet.  The brother is jealous, he has been attracted to his sister more recently as they got older but did not dare say anything before.  But now he decided he wants to make her his.  The sister is not initially attracted to him, but this is a story about a lighter way of changing.  He will not force her to do anything, instead he will seduce her and fairly quickly they will be sleeping together.  There could be potentially longer term cheating here, with her continuing to go out with her boyfriend but returning to her brother's bed at night.  Eventually she would likely ending up having sex with both of them (though not at the same time, the siblings know to keep it secret in addition to shame she might feel about the cheating).  Though of course the brother's goal is to make her want him only eventually.  The boyfriend could either be a background character simply referred to in passing or both boys could be played.  Heavy on the sex, but also a love story of sorts.  And she will likely eventually end up with her brother's child (might be intentional, might be an accident).

Brother/Sister - Modern Setting (gender bending):

The idea is here is what is originally a pair of brothers, but for one reason or a another the younger one becomes a girl.  It is a little awkward at first but the brother begins to lust after his now sister.  Eventually he gives in and makes his move.  I can either way on how willing the sister is.

Brother/Sister - Modern Setting:

In the case the siblings were separated at birth/young age.  Eventually the lost sibling is brought back to the family and to celebrate.  Not having grown up together, they don't have a strong connection as siblings and find themselves mutually sexually attracted to each other.  After they realize they feel the same way, they try to fight it briefly but then give in.

[MOD EDIT: Multiple Scenarios Removed due to Section 17, Sub-Section 4 Violations]