Brooding!Chuck, step up to the plate...you probably won't believe it, but I actually wrote this before I watched the most recent episode! Kismet or what?
In The Shadow Of A Giant
The thing Chuck Bass fears above all is turning into his father – far more than he ever feared living in Bart's shadow. He doesn't want to look in the mirror one day and see those cold, hard eyes staring back at him. He doesn't want to look at his children with revulsion because they have their mother's brown eyes, and that's all that's left of a love he tried so hard to bury. He doesn't want to eat, sleep and breathe money. He doesn't want to try to forget.
Whenever he thinks like this, Blair knows. She smooths back the dark hair from his brow and says things which halt the tapes of his father's disapproval reverberating in his head. She kisses him, the cool metal of her wedding ring burning against his face – a reminder of everything they have and have yet to lose.
When their daughter is born – a terrifying miniature Blair that screams and rages ten times louder than its mother ever could – Chuck relaxes a little. By the time their son comes along (after a month extra of waiting and Blair eating enough curries and riding enough bicycles to keep the Indian subcontinent afloat), he looks in the mirror to straighten his tie or tidy his hair, not to check if Bart Bass is glaring back at his son from an icy world of reflective glass.
He gets over his second deepest fear – that Blair's child would have bright blue eyes which denounce him as second best, consolation prize now and forever – and looses a final sigh of relief when their third (another girl) grips his finger tight and regards her father with snapping, catlike eyes the same dark hazel as his own.
Fin.