Her mother keeps pressuring her to get married soon.
Tips
grammar
嫁 is only used for women marrying. Men use 娶. The traditional saying is 男大当婚，女大当嫁 (when a man grows up he should marry, when a woman grows up she should wed).
register
嫁人 can carry traditional connotations of 'marrying into' the husband's family. In modern casual speech, 结婚 is gender-neutral and more common.
