South Northants MP Andrea Leadsom effectively abstained as she voted both ways on the bill which paves the way for gay couples to marry.
During the third reading of the Marriage (Same Sex Couples) Bill on Tuesday evening, 366 MPs voted for the bill with 161 against.
The vote, which was not subject to the influence of party whips, has divided the Tories with 133 going against the Bill championed by their party’s leadership.
During the final reading on the bill before it was sent to the House of Lords, Mrs Leadsom made a registered abstention by voting both for and against the bill.
In her blog – www.andrealeadsom.com – Mrs Leadsom said she was paying a great deal of attention to the matter, but is concerned the new law is being rushed through without the consequences being fully understood. She said: “As a Christian myself I believe that the love of same sex couples is as important in God’s eyes as that of heterosexual couples. I also believe firmly in the principle of equality as a fundamental ‘good’ in the secular world.
“I do recognise, however, the enormous potential this bill has for unintended consequences, particularly for those who live out their faith through their day to day work.
“I also recognise the hurt that this Bill has already caused to many of my constituents.”
She added: “I am extremely disappointed that legislation has been brought forward at this particular moment in time and find myself genuinely torn, understanding as I do the strength of feeling on the matter.”
The bill will go to the House of Lords after the half-term recess.