My DP was never as directly unsupportive, but he did start to make comments about 'when do you think she'll wean?', etc, and that was enough!

I would point out the advantages of her continuing to bf. DD bf until almost four and it brought us huge advantages in terms of her not getting sick. She's the only child at preschool whose never seen the doctor for illness, ever. Her first day off for illness was two weeks after weaning - not a coincidence I don't think!

If Shel knows you are committed to following Jazz's need and value both what bfing gives her in terms of your bond with her and the physical benefits to Jazz, perhaps she will back off? I'd also explain that you find those comments really hurtful, since you're still adjusting to not caring for Jazz as much as you used to and being able to bf her when you come home makes you feel as though you are still important in her life.