NICOLA Sturgeon has not spoken to her former finance secretary since his resignation, a spokeswoman has said.

Derek Mackay resigned on February 5 following reports he had sent 270 messages to a 16-year-old boy.

He quit on the evening the allegations were made public by The Scottish Sun and was suspended from the party pending an investigation the next morning.

READ MORE: 'Totally unacceptable': Politicians shocked by Derek Mackay revelations

Speaking to journalists on Tuesday, a spokeswoman for Sturgeon said there had been no contact between the First Minister and Mackay since he stepped down.

She said: "I believe the First Minister was asked this on camera yesterday and she made clear that no she hasn't."

Mackay was not mentioned in the Tuesday meeting of the newly reshuffled Cabinet and the First Minister.

READ MORE: Meet your new Scottish Cabinet after Derek Mackay resignation

Pressure has been mounting from oppositions parties and those within the SNP for Mr Mackay to step down as an MSP, which would spark a by-election just over a year before the 2021 Holyrood elections.

Public finance minister Kate Forbes was called in to present the draft budget in the chamber on February 6, with less than 24 hours' notice – winning her praise from across the chamber and contributing to her eventual promotion to Finance Secretary.

Despite taking on Mr Mackay's role, the new Finance Secretary will not have responsibilities over the economy, which were given to Fiona Hyslop.