Sarah, it sounds like nothing is really wrong, it might be just a habit thing. Interestingly, when Jack was just over 1, he was still waking in the night for a feed. MIL was staying overnight at our place and DH and I went and had a night away to catch on some "us" time and sleep (I was already pg again so it was much needed). I worried that he would wake for a feed and not be happy drinking from a cup, but amazinly he slept through the night. And then continued to sleep through the night (most nights) from then on. Then just recently when I went to Melbourne overnight, Tom who wakes nearly every night for a feed slept through the night I wasn't there, and the next night (but is waking again now!). It seems to be that the boys knew I wasn't there, so didn't wake, and in Jack's case it was enough to break the habit. Would you be comfortable going away overnight to see if that helps? You could leave Aaron home with Zander, or if you have parents or ILs close by that you trust perhaps they could stay over and you could make it a nice night away for the two of you. It could be worth a try and whether it works or not you will feel much better after an uninterrupted nights sleep.