cos ‧ set /ˈkɒsət, ˈkɒsɪt $ ˈkɑː-/ BrE AmE verb [transitive]
[ Date: 1500-1600 ; Origin: cosset 'pet' (16-19 centuries) , perhaps from Old English cotsæta 'person who lives in a cottage' ]
to give someone as much care and attention as you can, especially too much SYN pamper :
He cosseted her with flowers and champagne.