I want to deny this potential tenant. Would you agree?

[Linda Thomas]

Hello all,

A couple w/ 4 kids. She has been at her job for 4 months. He has been at his job for 5 months. Prior to that they were both at their previous jobs about 1 yr. She is living w her sister and he renting a room and they want to move in together. She put her sister as her landlord reference.

Would it be okay to deny based on too short of a time at jobs based on not having stable and reliable income

and also include in the denial letter that she doesn't have a landlord reference? 

would you agree w/ this ? 

thanks