Thanks Steffi N! Yes, I should put new pictures of Poupette and Grisouille, I will during the holidays!

I got more good news from the vet today, and Poupette may live for more than 3 years because the tumor was very small and not really aggressive, and it is not rare to see cats live for 10 years with proper care and regular visits to the vet. For those who may read this, the size of the tumor is very important: when it is less that 3 cm, the prognostic is good; if the tumor would have been more than 3 cm, we could not have hoped for more than a 6 months prognostic. So if a lump is getting bigger, ask your vet to check it as soon as you can. At first, my Poupette's lump was like a pea, and in 2 months, it became like the tip of a thumb.

Agin, thank you all for your beast wishes, they worked!