Should I donate a mattress?

[Jerad Grace]

Just recently visited by duplex and each unit checked out fine. No major issues, however I noticed in one of the units that the tenants daughter (20 something) appears to be sleeping on the floor in the 2nd bedroom. There is a headboard laid against the wall with pillows on the floor and blankets. I remember noticing this set up when I first purchased the house a few months ago.

I have an extra mattress and box spring I am willing to donate (I don’t need). Would it be unprofessional from a landlord position to ask about the living situation and offer to donate the bed? Should I mind my own business? Tenants have been long term and are in good standing.