I just wonder why my otherwise reasonable and lovely friends find it necessary to do this. It's never straightforward, either: the bragging is always veiled. For instance: "thank you for the 9am lie-in, kids!" (from the mother of a toddler and a 2-month-old), or "life is much easier now that my son can tell me which fruit he wants" (at 10 months? wtf?), or "sitting up at 5 months! walking next...". I like to think of myself as a fairly relaxed mother with no particular hang-ups about milestones, but this sort of thing gives me the hang-ups!