Yep, I do this also. And yes, shellbell, I too feel like the boobs are never in the bra long enough! Cooper (4 months old) sleeps 12 hours at night, so in the morning, I am busting at the seams! I give him a feed on both sides, then before I put him to sleep about an hour later, I always give him a top up.

I find sometimes in doing this he sleeps longer. But his average sleep is about an hour, so some days I am feeding him every 2 hours.