How Many Days We Can Get For Endorsement For V.V. for KSA.

Alhamdulillah I got a visit visa for my mother. However, she wants to travel to KSA after May 25 this year. Does any one know if this visa will be valid for stamping before May? or can this validity be increased before stamping.
If we don't get stamped then what will happen?

Hello... May I know how you did all the procedure of the visit visa of yr mum!... Actually my husband is on work permit for 3 years over here... & my mum wants to come & spend some time with us... Can u pls advice me... Thk u