I don't think we should get too carried away about this fund, it's not like they have really hit the jackpot. A few thousand would go a long way if they are innocent and they could be sued for it if there is a different outcome.
I was concerned about the brief clip I saw of this interview as the lady kept shaking her head(no) while saying yes!
Imo the private action by the MP is premature and goes over the heads of the police who should know more about the case. I think he is probably more concerned about 'why' the children were left alone and presumably he is working on the basis that the parents are guilty of something much worse and that if they are going to claim an abduction took place then they must also find a time when they and other family members were separated from the children.
Personally, I feel there is so much confusion in this case that they deserve support until some concrete evidence is put forward. Furthermore if the investigating police are so sure about the parent's involvement then why can't they release the other suspect from his suspect status.