Yes, they do provide extra bed but they charge extra
Yes, they provide upon request with extra charge.But standard rooms do not have enough space for extra beds. You can hardly manage in deluxe rooms as well.
However, check directly with them and have their offer in written via email. This hotel is something very unprofessional and tricky. They tend to avoid providing services as per what have been booked, resulting in- you get lower than what you paid.
Get an answer from Sapphire Suites staff and past guests.