Sounds like she misses you! That's why all she wants to do is nurse when you get home from work.
Are there any other major changes going on in her life? New routine? New sitter? Different or unpredictable schedule? That could be it, too....just needing the comfort of Mom to make her feel okay. Another possibility could be needing comfort due to teething.
Does she have any other separation anxiety issues?
I'm 37 and a stay-at-home mom with a 2 year old, whom I nursed for 20 months. He thankfully weaned himself, but I had to help it along. Around 18 months (when we discovered he was no longer severely allergic to cow's milk), I started the transition because he was still nursing 5 times a day. I made sure he was filled up on regular food and then I spent a lot more time snuggling and cuddling with him. He wouldn't let me shortened the duration of a nursing session, so I started cutting back on the number of times per day I would allow him to nurse. I've heard the hardest ones to give up are first morning, naptime, and bedtime, so I cut out the mid-morning, and the early evening sessions first. Then on his own he gave up first morning, then naptime, then bedtime, in that order. When I cut out a nursing session and he would ask for it (or rather, sign for it since he just started talking), I would tell him, "It's not time to nurse but we can snuggle as much as you want!" He really liked that idea. It meant I had to stop what I was doing sometimes to just hold him (while did things with one hand!) or cuddle, but I always told him at the beginning of the cuddle session how long we could cuddle, so that when I had to get up to do other things it wasn't a shock to him. That seemed to work pretty well.
Maybe if when you first walk in the door, you allow her to nurse and cuddle her for a while, that would help her.
Feel free to email if you have any questions!