Hi Bina,

I totally agree with Abymummy that it's best if your brother could go to your home daily for Lulu, or if not, put her and babies in your brother's home. She should be familiar with your brother, right? This will help lessen the stress for Lulu.

I think if she's not in pain, it should be alright. Some articles mentioned that it's quite normal for a cat to be pregnant for up to 71 days. Here's the article. But for your own peace of mind, you might want to take her to a vet, especially since you have the date of mating nailed down.