My husband and I have 3 kids (10mo f, 4m, 10f). We currently have a nanny, Isabelle (22f) 3 days a week.

I have to say, Isabelle is fucking amazing. She drives on field trips, she does homework with the kids, she handles play dates, she's the one adult my 10 year old likes, she's not dependent on screens, does art projects with the kids, she speaks 10 year old, and she's even teaching them how to cook and bake. They made mini quiches a few weeks ago.

My oldest is doing state testing right now and wanted a fun activity with her friends. Isabelle suggested a spa day and my daughter loved it. I set up a day for my 4 year old to go home with his grandparents and let Isabelle turn our living room into a spa. She picked up my daughter, my niece, and 2 friends, brought them to our house, and did their hair and nails while they laid back and did face masks.

I guess my niece was telling her mom how cool Isabelle is because my SIL texted Isabelle offering her a nanny position 4 days a week, matching whatever I pay her but for only 1 kid. Isabelle showed me the text and told me that she will have to think about it because the extra money would be nice. I told her if she promised to stay, next year I'd have her at 5 days a week with a $5 per hour raise. Isabelle turned my SIL down saying she had received a better offer and now she's telling my husband's family that I stole a nanny from her.

They're upset that I outbid my SIL and gave Isabelle extra money and hours just so my SIL wouldn't get her. My husband said it was petty. AITA for offering Isabelle a raise and more hours so she doesn't work for my SIL?