New land lord in boston looking for advice!

[Mamdouh Mikhail]

How are you doing all, I’m a new landlord for an apartment listed for rent below market price. The apartment is in good condition, with wooden floors and a standard kitchen. I have a tenant coming in asking to rent the place, who has a partner with a 12 year old kid (the kid is his partner’s). He wants to have the lease only under his name, should I include the lady and kid in the contract? What happens if he decides to leave and she stays behind and doesn’t pay rent? Any advice?

Thanks all!