I genuinely don't understand the responses you've had criticising your reaction.
Seems clear to me she's trying to appropriate your child while excluding you.
This is undoubtedly inappropriate and unacceptable behaviour.
Why I really struggle with. Possibly to ingratiate herself with the doting grandparents? Which is bad enough but there are possibly more sinister motivations too.
Has she had mc or fertility issues of her own? Is she wanting to ttc but bil doesn't!
I would be very uncomfortable with someone like this caring for my young child.
And while its rare that women are sexually abusive it sadly does happen and unusual behaviour like this would definitely get my hackles up.
"She regularly makes comments that suggest she disapproves of our parenting and blatantly says about some things that we are dealing with it wrong and it’s not what she would do etc."
Wtf! Not her baby not her place to comment! Who the hell does she think she is?!
"People who groom babies don't do things in plain sight" @Jemima232 I'd absolutely love to know what your experience and qualifications on the subject are because you're wrong! That is in fact what many abusers do, hide in plain slight, push boundaries in the presence of adult guardians, gaslight and criticise adult guardians...
And even where women are not active paedophiles and abusers themselves they do enable men who are I'm wondering if the posters dismissing this concern are completely unaware of or have forgotten of the existence of the likes of Myra hindley, rose west, Vanessa George, Marie Black - just in January this year Sophie Elms was jailed for crimes of this nature, an 18 year old nursery nurse.
And we don't really know how much it happens partly because just as with male offenders victims are reluctant to come forward because they're embarrassed or think it was their fault. Or when they do they aren't believed. With female offenders I suspect there's additional issues relating to it not being seen as something that women do, so victims may feel even more so that they wouldn't be believed (and judging from some responses on this thread they wouldn't be far wrong!) plus women are more likely to be trusted with younger pre-verbal children who can't report.
What does mil say behind sil's back?
@lizzielookattheflowers have you even read all op's posts? Op has given a fair few examples of sil not only overstepping personal boundaries but ignoring basic common sense child safeguarding practice! You're right the child is the most important person but sil's behaviour isn't prioritising their wellbeing far from it! In addition you seem to have misunderstood the relationship to the op, child and grandparents. This is not the grandparents daughter but daughter in law, is only related to either the op or the child by marriage and by the sounds of things hasn't been a member of the family at all for long and has made zero effort to get to know op - the opposite in fact has avoided developing that relationship and even seeks to pretend that their relationship and op's place within the family are non existent!
"The calendar wasn't a deliberate slight against you" if that were true why not one single photo inc op?
"are you the SiL?" Wondered the same myself!
I'll be honest. If I were in your position I'd be getting sil alone and telling her in no uncertain terms to back the fuck off! That your child isn't hers and it isn't for her to behave like their parent in any way, certainly not to ignore your (plural inc dh) instructions and directions as to how the child is cared for! That there is to be no more posting photos of your child on SM without checking with you first, no more disappearing to take your child out and about without your knowledge or permission and no more treating you like you're an inconvenience while suffocatingly overdoing it with baby.
People like this depend on others not wanting to cause a falling out or bad atmosphere. Sod that! If anyone's responsible for that it is her!
I've looked after hundreds of people's children, I would never overstep like this, have never posted any child's photo on SM without parents permission (even though I'm hot on privacy settings), taken a child anywhere other than where the parents expected them to be without permission, taken over from another person put in charge of a child excepting emergencies, let alone gone out of my way to (as a pp rightly said literally) cut a parent out of the picture!
SHE is the one that's batshit!
"My bigger question is why don't you want to develop a relationship with her?" Op has said repeatedly that she's tried to include sil socially and get to know her and develop that relationship - it's been the sil that has rejected this at every opportunity!
"She has nephews on her side on the family yet doesn’t seem particularly interested in them" that's potentially concerning. Is she more interested in your child because she's a girl? If so what motivates that? Or have her own siblings also experienced this issue with her and she is no longer welcome to be involved with those children?
"Was MIL really ill?" I'd be wondering that too!