LO enjoys bathing at home but when she baths at my mum's home, she will cry hysterically. Any mummies experience this? If yes, what can I do? Will she react like this when we are overseas?

Experienced it once! My fil used to bathe my LO in his toilet but there was once his toilet was unavailable hence he brought the tub to my toilet to bathe her instead. The moment she was placed in the tub, she looked around and started crying even though my fil was still the one bathing her! She only stopped crying when she was out from the tub and back to my room to put on her clothes.