<human>: Could you distill the essence of the text into 1-3 sentences?

I got engaged 10 months ago, and our wedding is on September 1, 2013. Just about 3 months to go and I'm having the hardest time vetting out my SO's and my family's involvement. 

I am my parent's only child, and they adore my fiance. They want to help, and have each (divorced) allotted a certain amount they will contribute toward the wedding. These amounts were decided months ago, and are almost enough to cover the whole wedding. Just last night, my future MIL emails me a list of things that she will pay for. Up until now, we have known they would help, but not how much. The things she has offered to pay for are the largest items, but also have down payments made by my family and I.

I appreciate and understand my parent's approach, and it allows me some flexibility and aid in the things that people don't ask to pay for (Tip, outdoor restroom, insurance, etc). I think my MIL is subtly trying to edge her way into the budget and gain control over the most important parts of my wedding. Don't get me wrong, she and I get along well and work together well, but I am a project manager, this is my wedding, and I cannot allow this to be made an issue of. I want desperately to speak to my mother about all of this, but I am worried she will become emotional and defensive toward my MIL.
<bot>: trying to juggle getting what I want out of my wedding without offending my mother and MIL and feel like I'm pulling my hair out trying to make everyone happy.