I have name changed for this one.
I have 2 DC aged 6 (from previous relationship) and nearly 3. My marriage has been very up and down and if I'm honest I think we would be be out of the relationship had it not been for the DC.
MIL has been very interfering from the start but I have let it go, despite different friends and even my counselling lady (for trauma I had in past) having said that they are worried about how she acts. MIL has intimated on a couple of occasions outrageous things like -
5 years ago when me and H moved in together I overheard a conversation where she asked H if he really thought he should be moving in with someone who already has a child, that she "never thought he would" and was he really sure it was the right thing for him etc
. And also telling him that he would "always have a home here you know that" . double
.
Also once she expressed disbelief that I wanted to go back to work after my maternity leave (having no idea of our financial situation at all) and she said in a phonecall to me "Money means more to you than children"
!
H does backshifts and I do days so he often brings the youngest to MIL's during the daytimes. Tonight I got the following text message from MIL when DC back home and in bed -
MIL "How is (dc1) and (dc2)?"
me - "fine. how was (dc1) today when at yours?"
MIL "fine but to be honest he didn't want to go home so that makes me concerned"
me - "what do you mean exactly by that statement?"
MIL - "what do you not understand what the word concerned means?" 
MIL - "I'll put it in simple terms to you so you maybe can understand. little (eldest dc, nearly 7) is sick of doing house work that her mother should be doing, she is 6 not 16. and as for (youngest dc) you deal with the bonding before you leave it too late. and maybe cut down on your shouting in front of them"
WHAT IN THE NAME OF ?!!!! 
I in no way force my eldest to do too much housework at all. She does age appropriate things like hang up socks, quick swish of her sibling's highchair with a baby wipe, "help" me clean out hoover by holding open the bag, tidy away toys etc. If anything, it was MIL who spoiled H and now he is a lazy sod!
As for the bonding thing, I have no idea what she is on about. Perhaps she is deranged. I had PND with my eldest but I didn't even know MIL then and I was terrified I'd get it a second time but didn't get it, but thankfully I never and have a lovely relationship with DC always cuddling and kissing him, maybe not so much publicly in front of her.
I do shout, but no more than most mothers I know!
All I can guess is that it is her way of trying to undermine my role as a mother. Because there really is no truth in what she says. H has a nasty habit of saying (nasty) things to me in arguments about my parenting but is generally more loyal and did stick up for me when she had her comment about me going back to work.
Does anyone have any advice on this? It has really quite scared and intimidated me. Should I cut down her contact by drastically cutting work hours (she does see them a lot) and not allow her to see them on weekends or anything if she is obviously just gathering "ammo" to use against me? I have been shaking with anger for ages over this. Phoned H at work and told him but he is busy and gave a curt "It's none of my business" response
.
aaaaaaarrrrrrrrrrggggggghhhhhhh