As an ex-evangelical my kneejerk response is to say avoid.
BUT, if there is no other reasonable option it may be be fine.

They probably will not be explicity treaching what you mentioned. They may emphasise the bible creation story of a man and a woman not two men like on TV, etc., they'll hear about the Noah story and people being drowning because of their sins.

But... at 2... this is probably not going have a big impact on a child over the short term; she will very likely treat it like any other fairy tale, especially if at home you are not reinforcing those things as true.

Just make sure they don't hit the kids as punishment etc "spare the rod spoil the child" type of people.