Salam, 
I wanted to ask a girl who is independent of her affairs, financial and other affairs, she is 24yrs old and virgin and she wanted to do muttah because she doesnt want long term marriage.she fears she might commit sin due to her needs and she wants muttah marriage to address her problem. does she need a consent from her father and if he says u can decide on your own he her father has no issue then she can do muttah.
2nd if he shows his reservation then still she needs his consent or she can do it without it knowing she is independent  of her affairs
 
Thank You