Needing some calming words and some advice.

I’m not sure how you lose two flower orders. I would consider trying to find a different florist. I would continue to try to set boundaries with you FMIL. If you don’t do it now, she will continue to act like this the rest of your lives. It may be time for your FH to have a discussion with her directly.

What exactly do you mean by “lost” 2 flower orders?
I’m not sure what this means exactly, since you haven’t had your wedding yet, but if your florist is being unreliable already I would definitely look for another one!
As far as your FMIL goes, I think you and your fiancé need to remain a united front and set boundaries with her when it comes to your child. As far as the wedding goes, I would just stop sharing any details about the wedding with her from now on.

View Quoted Comment We went to the flower shop and put in our floral arangements that we wanted and we'll apparently they got some new staff and we went to go and pay so we can have our floral arangement that we wanted and they can't find our order so we can pay to have them at the wedding.
As far as the FMIL her and my FFIL take my fiance and I places instill we can get a Car. We have also been using taxis to help keep my FMIL out of our business as much as possible.
Part of the whole reason she does not want us getting married is because he would loose his disability money and insurance. She got pissed that he went and got a job, because she knows that means she Can't be his payee any more and she can no longer control him. He is at the point in his life where he really will not need her when we are married. He does not want her to be his payee anymore and he absolutely hates being on disability and he is doing something about it. After we are able to save up and get maybe a second car he is talking about working full time. He likes his job and wants to do more with his life not just for himself but for our son and for me.

Well I do have some good news the floral shop was not able to find my FMIL and I order but they put it in and because of the whole issue they are discounting it so it will be less than 300 after taxes and delivering them to us for free. The new florist is really kind and sweet and she discounted it and said free delivery for the whole inconvenience and she apologized like a million times. I am glad it got worked out for us so it is less we have to stress out about.