Cultural differences aside....there are many times, differences in the way that mother-in-laws parent and that daughter-in-laws parent. As the mother of the child, you decide the best method for your own baby.
That being said, the MIL bore and raised a son, a man that you love and admire.
She must have done something right to have raised a son into the man
that became your husband.
Obviously there is a lot of love in that family.
My standard response to baby advise: "Thank you for being so concerned,
I'll take this under advisement." (Does not mean you are going to do it,
but it does get respect to the individual who loves your baby too.)
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[i] "Which for me will be a big problem b/c I plan to BF and the only one who can feed my child is well...ME!"[/]
Well, when I had DS#1 and was brand new on BF.....two of my sisters also had babies the same year and BF their two sons.
On the 1st meeting with my new baby to my sisters & their children, I suddenly could not letdown my breast milk.
Call it nerves, not enough to drink. DS#1 wanted to be BF and it wouldn't go.
So, I went to make a bottle.
One of my BF sisters was ready to BF my baby at that moment "to help."
I just gave the bottle for a couple ounces instead. Then as I relaxed & my son relaxed, my milk was able to let down.
This was my sister offering mother's milk. It would have been just fine w/ me at that point and now several years later. One mom helping another mom.
Now, had it been the same offering w/ my SIL......it would have upset me to no end.
Isn't that silly?
My 2 baby nephews being BF thought that I really smelled good = mother's milk.