Problems with my mother in-law?

My mother in-law and I have been super close ever since my husband introduced me to his parents when we were still dating back in spring 2001 and we never had any issues whatsoever. I started getting very irritated once my daughter was born. Because I don't get along very well with my blood mother .. my mother in-law came up and stayed with my husband and I. She even helped me through labor/delivery, which I was very appreciative and thankful. Things started to fall apart when I couldn't get the hang of my daughter latching on because my daughter was born 3 weeks early than her scheduled due date and she had a poor sucking so she never latched on. My husband and I borrowed a hospital grade pump from the hospital, which my MIL became very upset with me every time I used it. I even used a shield, which she told me a story about snatching those things away from her girlfriend because in her opinion mothers should be able to latch their babies no problem and it's unnatural for mothers to be using shields or even pump so she had snatched them away from her girlfriend, which she then flushed them down the toilet to make a point. One day, after I finished pumping my for milk .. my MIL stormed into my bedroom, which is a safe and private place for me to relax and she yanked her top off (shirt/bra) and shoved her perfect / in my face telling me how she was able to feed both of her boys no problem. Her s weren't inverted like mine are. Since that day, I was so pissed off and so upset the next day I confronted her without bringing my husband into the middle because really this was between my MIL and I. She totally got scared of me and started having attitude problems towards me. Anyways, since then my MIL and I haven't been as close as we were and whenever we see each other or whenever she emails me she has this attitude problem where she says things that would make me offended. She'll say things that aren't true so I always have to reply back to her emails letting her know that what she is uming isn't true or I hate it when she compares me with her other daughter in-law. My sister in-law is a whole other story, which we have nothing in common whatsoever. Anyways, I am unsettled because my sister in-law and her daughter are flying back in from their Christmas/New Years vacation from visiting her family and my brother in-law and his mom are coming to visit with my daughter and I tomorrow, which they will be staying with us for about 3 hrs. Cringes. Now I understand when others (some) have issues with their MIL. How do you deal with this? Also, it annoys me when MIL constantly brags about what her boys did when they were infants now that my daughter is an infant. It's so annoying!! I tried talking to my husband about this, but every time that I do is when I make his feelings upset and if you're curious he's a mama's boy so not sure if that matters or not, but how do you daughter in-law cope with this? Any tips or advice?