The former Health Secretary has whisked his lover away to a £87-a-night in Villars-sur-Ollon, near Montreux, Switzerland where they were pictured earlier this week.
It has been claimed Mr Hancock has yet to say sorry to his wife after their 15-year marriage broke down in the wake of the scandal.
A family friend told The Telegraph: “He is definitely not a gentleman. He keeps trying to suggest that all is fine when everyone has been left shattered by this. He has been horrible to Martha and has not at any point apologised to her or the rest of the family for what he has done.”
The insider added: “Martha has been crushed by this, and Matt is only interested in his career and his mistress.”
Their holiday is understood their first trip abroad together since their relationship came to light in June, The Express reported.
Mr Hancock has three children from his marriage.
Ms Coladangelo also has three children with her multi-millionaire husband Oliver Tress who founded Oliver Bonas.
At the time the scandal broke, Mr Hancock said: “The last thing I would want is for my private life to distract attention from the single-minded focus that is leading us out of this crisis.
“I want to reiterate my apology for breaking the guidance, and apologise to my family and loved ones for putting them through this. I also need (to) be with my children at this time.”