Well, I'd suggest the opposite (to happen)
1) in AN 23 Kelly told Dylan she came "prepared" and that she had (brought) pills to prevent her to get pregnant and she let Dylan shoot his sperm into her.
2) I suggest a dialogue beween Brandi and Victoria (or is it Fucktoria) wherein both "confess" that they have taken contraceptive measures in the past but have not told anyone (yet) as not to encourage their respective son(s) more than they have already.
[[ Brandi "remembering" she has had an IUD (Intra-Uterine Device) placed during her divorce proceedings because she didn't want to have another child by her lame husband
and
Victoria (or is it Fucktoria) having her "tubes tied", many years ago, for the reason that she found out/knows that her husband Martin was cheating on her and she already has had two children and didn't want anymore anyway.
(This also makes a scenario possible where Brandi, Kelly and Victoria (or is it Fucktoria) and their "offspring" have an (private) orgy, in the island tradition, whereby they all three get spermed into multiple times without any conseqent "problems"..... (and ofcourse it frees up the women to have "sexual relation(s)" with the other males on the island) ]]
Just my 2 cents.....