Rant- future SIL and my baby shower

Rant- future SIL and my baby shower

My future SIL asked me when my baby shower was going to be so she could take the day off from work. I told her when then we were talking about how it's going to be costly. I was telling her I was going to see if my future MIL was STILL interested in helping my friend plan the shower since my friend is a very busy person and could use the help. Then I told her my DF and I were paying for the cost of food cause it is a jack and Jill shower and it's a cook out. She tells her husband (DFs brother) that I was going to ask my mother in law to pay for the shower cause I couldn't ask my friend to pay for all of it. NOT what I said at all. My DF already knew what we were planning to do and his brother contacted him saying it was fūčked up if I asked my MIL to help because she just did a bridal shower for there sister. I explained myself again to SIL about what I was going to say to our MIL because I wouldn't ever expect anyone to just pay for stuff or even come out and ask someone to do that. SIL lied to me and said she never said something to DFs brother! When my DF said that she sent his brother a screen shot of our convo. And she tried playing it off like she didn't know what I was talking about. Sorry if this is all over the place I'm just annoyed that she would lie to me and twist what I said then act oblivious when I bring it up to her.