Try not to get ahead of yourself. She is lucky to be so loved. I am so sorry you are going through this. Sending good Thoughts for her recovery, love and more love to all of you!💗💗💗🙏🏼

I know stuff in our lives will go south than go up

purpose is not to set a foster up for a long, spoiled life but to comfort and give a loving send off. Immortality isn't to be found on planet earth and animals have souls... lots of reports in NDEs of pets being taken care of until they're reunited with their loved one. Every form of life has energy and energy cannot be destroyed. Don't say goodbye. Say until later.

But no matter the outcome, you should feel assured that you gave her the love and very best care you could provide.

If the odds are that good, should be.

Be at peace with your decision and spend the pre surgery time with her celebrating your relationship, be productive with her by talking to her, thanking her, holding her, and yes, feeling some anxiety as that is normal.
My main point is please celebrate your time together for precisely the reason you worry.

I pray she comes out of her ordeal a renewed angel that will continue to be yours as you are hers.

I hope Lily gets the tumor removed and it doesn't return or spread and she lives a long healthy life. I pray that you you are reassured by her living through the operation and heals without a hitch. Positive energy going your way.

Be at peace.

positive vibes. May Love and Light surround you both.