Complex sentence: Still, it'll all be waterbeds under the bridge when Nancy becomes pregnant (my theory) before her colleague Caroline Fitton commented on Darren and Nancy spending less time together because of her new job saying it proved "the girl had some sense".
Split into simpler sentences: Still, it'll all be waterbeds under the bridge when Nancy becomes pregnant (my theory). Stephen's colleague Caroline Fitton commented on Darren and Nancy spending less time together because of her new job, saying it proved "the girl had some sense".