Renter getting married

[Thomas Giganti]

My renter who has 2 children and currently resides in my rental unit just informed me that she got engaged to her boyfriend. The boyfriend has a child and they're looking to have them move in later this summer. Renter has been great thus far and no issues since moving in this past October. Leaning towards allowing it but starting a new lease with both their names on it and increasing rent by $100 (about 5% increase from current) since 2 more people will be adding to wear and tear. Does anyone see any issues with this? Anything I should consider before proceeding? Any advice would be appreciated!