Stranger anxiety

My 8m old is having stranger anxiety. I know its normal but.. My husband and i are working full time. Baby spend most of her time w my new helper and MIL. When im back from work, she will reject the rest of them totally and wants me. Despite me spending lesser time w her due to work. Every sunday i head over to my mum's place but she will always cry and refuse to let my mum hold her. Even if my BIL or SIL comes over to my place every week she will cry and doesnt want them. Any ways to help her overcome her fear slowly? 😊