Hmmm.. I recall one incident like this with a pregnant women. (but years ago).. So I do not remember exact circumstances. Iguanas can be a bit sensitive when it comes to hormones.. And he might smell the hormone change in her.. the iguana too, might have a hormone shift of his own (aka mating season).. If that is the case I would not let him around anyone at the moment as they can be quite unpredictable.