<human>: Let me start off by saying, she isn't getting married until *May* of next year, yet she and my mom are completely frantic about the wedding.  I'm a web developer so when my sister got engaged (in *August*) it was expected of me to make the "wedding website."  I did it willingly but now every time either of them thinks of something that needs to go on the site, they call me.  It doesn't matter where I am or what I'm doing, they call just to ask/tell me something for that.  My mother calls me at work constantly just to ask "did you put *such and such information* on the website yet?  When do you think you'll get a chance to do that?"

This past weekend, I was vending at a festival and right in the middle of transaction with a customer, my cell phone vibrated.  I saw it was my mom and figured I could call her back plus I didn't want to be rude to the customer, but the second it went to voicemail, she hung up and called right back.  Didn't even leave a message so I figured someone had died and hurriedly excused myself, only to have it be another thing about the damned wedding. 

My mom complains to me in private that my sister is turning into a bridezilla but I think my mom is just as bad.  She can go days at a time without talking to me but the second anything comes into her mind about the wedding, she has *got* to get in touch with me that very second.  It's driving me nuts and I don't like being put in this position at work.  I'm also working full time while in grad school, so my free time to work on their wedding crap is somewhat minimal.  What can I do/say to get them to back off without creating some huge drama or ruining my sister's wedding?

Can you give me the gist of the text in a nutshell?
<bot>: Sister is a bridezilla, mother is feeding her neurosis and keeps bugging me at all hours to do random, non-urgent shit for a wedding that isn't happening until May 2012