They live in Glasgow and have four children at home aged four to 16. The couple receive £240 in child benefit 13 times a year, and £600 a month in tax credits.
Ms Guthrie said: "Overall, I thought it was a positive Budget, and the changes to the personal tax allowance will leave us with more money in our pockets.
"Freezing fuel duty is something we welcome. We can spend between £200 and £250 a month on petrol so any help with this is greatly appreciated.
"The cap on welfare spending is not something that worries me. When you are receiving tax credits it is a very complex calculation and there have been a lot of changes so you get used to them going up and down.
"At the end of the day all that money goes on household expenses, so it is just a case of tightening our belts rather than missing out on things we need.
"The changes to pensions is not something I would have thought about previously, but as I find myself getting older I pay more attention to it.
"We try and save, but it is little amounts - basically money for a rainy day. But extending the ISA allowance will encourage my children to save, and my daughter already has a junior ISA.
"The real financial issues that affect our family are the cost of living. Neither of us has had a pay rise in four years, while the cost of everything else has risen."