So i told my husbad that i will sacrifice us getting another vehicle even though we really need it…

So i told my husbad that i will sacrifice us getting another vehicle even though we really need it and just take the kids on a little vacation and we were talking about it this morning and then he ask me if its just going to be us going and im like yes duh and i ask him why well he wants to invite his mother and i just dont want to be around people like that like to talk shit about other people just to make her look good and innocent i rather just be us like its been for the last 4 months im happy but in the other hand my kids keep saying they miss her and as much as i really dont want her around my kids anymore idk what to do if i say its ok for her to come idk if ill be able to control myself to keep my mouth shut and dont tell her nothing cause i just feel like someone needs to cause she thinks that's ok behavior and then just be around the people she talks shit about and be ok with it and even though I know it wont be the right time or place idk if i can be ok for me to be around her i need advice what to do with this situation