That reminds me mother's day is coming!!!
Below 1K ==> try citizen (eco-drive) or seikos. I believe they have a large range of ladies' models (seiko lukia is

but not 100% sure if this range is found in Malaysia). Or maybe Baby-G?
3-5K ==> try tissot or yes, longines. At that price range, you'll probably find the ones with quartz movement, which probably suits the ladies (from my own experience, often they don't have any interest in mechanical watches anyway). But I think you may also get your mom a Ball at that price range after discount.