18 months. He got 4 molars at once and despite giving him every opportunity to come back to the breast, he was done for good. Surprised the heck out of me, and I posted here for help.
First baby nursed until 19 months when she lost interest. This was a more gentle weaning and more how I imagined CLW. She also nursed or pretended to nurse on occasion between the ages of 2-4, but only very rarely. I still consider her to have weaned at 19 mos.
I am not a SAHP, which may have contributed to the age at weaning, at least for #1. For the second baby . . . those molars just ended nursing.
I have never put any limits on nursing, except for a brief period when the second baby was about a year old and I had a broken rib and couldn't get up often in the night. It did not significantly impact our nursing relationship.