Cousin wants to bring 1 month old to wedding

Bec20

Everybody would understand a one month old baby, because that baby is still a newborn.  However, it sounds like you really don't want this baby at your wedding so just tell your cousin no and expect she won't come.

It isn't so easy to leave a newborn alone for "just 4 hours" if you are breastfeeding.  He may need to eat twice during that time which means, even if your cousin is apart from him, she will have to pump at those times to keep her supply up and to prevent herself from being in a lot of pain.  She would also need to pump to get him milk for those two hours.  This is all if they are comfortable giving him a bottle/pacifier at all, which many mothers aren't due to nipple confusion, which could very well be a concern if she and the baby are still figuring out breastfeeding.  It may not be as much of a concern if you known for sure that she's going back to work a few weeks later, but if she plans to stay at home or is from an area with mandated maternity leave (ex. Canada's 1 year), she may not be willing to give this baby a bottle for several months.

If it's important to you to have your cousin there, invite the baby if you don't want to take a big gamble that she isn't comfortable leaving him.  If you don't really care either way, don't invite the baby and see if she & her husband still decid to come.