She is a MOM for crying out loud....and thus, when you go on a trip... you HAVE to consider your child...not treat them as an extra baggage. The needs of a baby, has to come first... not the trip.
NO, 3 weeks is too long of a time to leave her home, with a Nanny that she does not even know. I think SHE should stay home, with her child, and forgo the trip.
The way is seems...is that the trip is more important than her child's needs.
Next, why was the trip planned, if her child is only 1 years old?
Next, since she is going with her WHOLE family....THEY can certainly help, right?
Next, yes, it is very physically tiring on a trip abroad....I'm an adult and when I went abroad and did all our activities, even I was tired! It took us nearly 24-hours, just to fly to Europe! And by the time we FINALLY got to our destination, I was pretty darn tired/irritable/grumpy myself. Then, we spent ALL day, out and about touring and traveling. We would get back to our lodging at night time. EACH day of our trip. Not much time to rest.
ALSO keep in mind, that depending what country they are going... it is not always 'baby' friendly, there is NOT always nice clean bathrooms or baby changing tables, there is not always the amenities around that you need for a baby.
There is not always even an elevator to go with a baby in a stroller.... and then there are only stairs. Especially at historical sites.
ALSO... if they are going at this time of year... it is VERY cold.... and baby can get sick. I got sick when I traveled abroad at this time of year... I got very very sick. NOW, what will you friend do, if her baby gets sick abroad??????
For me I was lucky, because my Hubby is bi-lingual and knew where to go. So, my severe health problem could be handled. Is your friend FULLY prepared for any situation???? Abroad???? With her baby?????
Believe me... if at home it is hard to just go grocery shopping or errands with her baby... just think how it will be doing this ABROAD? It will be magnified.
The 'choice' should be, not whether or not to take the baby with her, BUT rather: should she even go in the first place?
Anyway, I think it's a bad idea.
Good luck,
Susan