Creative Mortgage - Can Fiancee "pay rent"?

[Jason Wright]

Hello Bigger Pockets!

So, recently I was prequalified for (x) amount of dollars through a mortgage broker - it is solely based off of my debt-to-income, but I am using "gifted funds" from my fiancee for part of my downpayment/closing costs. Her DTI is fairly high, so having her co-sign on the loan did not help us gain more purchase power. She will be living in the house with me and helping to pay the mortgage every month. Is there a way to show that she is technically "paying rent" so I can qualify for a high mortgage amount?

Any insights, advice, and recommendations are welcome!

Thank you,

Jason