they are getting ahead of some kind of proof against them.
for example pictures showing she never had a big belly in the time dating before the birth of her children.
most probably they found some kind of papertrail
claiming the kids were in vitro fertilisation to give them a new identity as "obama" children.
thats why she has to come out claiming it was her idea to have IVF.
but most probably nothing of this is true and they just adopted kids of some friends.
reminds me of Epstein Island burning.