Some cases demonstrate a pattern which is compatible with that claim. ( No incest ones I know of. )

Things compatible with consent ( but not proof of it; )

When the girl exerts effort to meet her "rapist" ( ie, flies out of state to meet him on school holidays. )

When the girl refuses to corroborate the charge.

When the girl refuses to assist the prosecution.

When the girl ( now an adult ) hooks up with or marries her "rapist."

Although this says nothing about this case, or indeed, about any incest case... I can't fail to notice that if none of these is present in an incest case is also because none of these is necessary, or feasible, to pursue an incestuos relationship. Usually they would be live in or have a visitation calendar; whenever the accusation comes up, since the procedure involves family breakup they're likely to be treated different as in an extrafamilial case, making it harder for them not to testify; and of course later dating or marriage is not possible, at least not openly.


But I will agree overall that either of "no sex happened at all" and "non-consensual sex happened" are each statistically likelier possibilities than "consensual sex happened" is.