How do you respond to 'mon chéri' in French?

You respond to mon chéri ("my dear"), a term of endearment typically used for lovers or by parents to children, with the same phrase or with another term of endearment, such as ma puce ("my sweetie" loosely and "my bullet point [on a typed list]," "my [computer] chip" or "my flea" literally) or mon chouchou ("my favorite," "my pet" loosely and "my [hair-holding] scrunchie" or "my [fried, summertime] pastry" loosely).