I would be keeping her inside if she is ill and so close to delivering if I were you.
She could also be spreading the illness to other cats if that is what it is.
Also, can't females carry more than one pregnancy? I am not sure if they can get pregnant while this far along, but I do know that many males can impregnate one female in one heat (thus she can potentially be carrying more than one male's kittens)
Whatever problems you are faced with, I would suggest keeping her safe inside.
She could also be spreading the illness to other cats if that is what it is.
Also, can't females carry more than one pregnancy? I am not sure if they can get pregnant while this far along, but I do know that many males can impregnate one female in one heat (thus she can potentially be carrying more than one male's kittens)
Whatever problems you are faced with, I would suggest keeping her safe inside.