My kittens are just about 12 weeks old. Edith, their mom, STILL lets them nurse. They don't need to. They've been eating food and drinking water for a couple months now. I think it's more of a comfort thing for them. Edith's showing no interest in deterring them.
I usually catch one or two of them nursing at a time a couple times a day. Sometimes it'll be a day or more between me seeing a particular kitten nursing. It seems to happen more at night, but that may just be because that's when I notice the most.
I've tried pulling them off her when I notice it. I've tried making her stand up so she'll walk off. I've even tried squirting them with a spray bottle. Nothing's worked so far.
I need the kittens to be fully weaned. Edith needs to get fixed, but that can't happen until her milk dries up.
If anyone has any suggestions, I'd appreciate it. I'd prefer ones that don't require me to constantly follow her around pulling kittens off her. I do have to go to work and sleep.