Originally Posted by iahphx
I probably would NOT alert the fa in advance: just in case you get one of the nasty ones.
Just switch when you want to. If anyone questions the move, just smile sweetly and say you switched with your husband. The odds that they'll send you back (and bring back up hubby) are MUCH less than if you ask to do the switch in advance.
I totally disagree.
If I am serving BF and walk through the cabin to suddenly find a new face, and know nothing about what is happening - I am probably more likely to be suspicious and a little peeved. If someone says to me, "After the service would it be ok if my wife and I swapped seats? I'd like to let her sleep well..." or whatever, then I know what is going on and I am more than likely going to be totally fine with it.
The best plan is to let the ISM know when he/she comes around and greets the passengers at the beginning of the flight - or let the FA know in the beginning if the ISM isn't able to get around to everyone. If you assure them that you will wait until after the first service is done and won't be switching back and forth all night, it should not be a problem with most FAs.