Her daughters Lucie and Isobel, now 16 and 10 respectively, have each had a heart transplant after being diagnosed with dilated cardiomyopathy, a condition where the left ventricle becomes enlarged and weakened.
Mrs Perry told Radio Surrey that Lucie was diagnosed "out of the blue" at the age of two, before Isobel was confirmed to have the same condition during a check up seven years later.
Referencing Lucie's diagnosis, she said: "I went from being with the GP in the morning to that in the evening... it's a lot to get your head around."
Going through the process again with Isobel was "horrific", Mrs Perry admitted.
Lucie got a new heart within eight days of being listed, while Isobel - who had complications prior to joining the list - waited just 10 days.
Mrs Perry said the disease meant both children had enlarged hearts.
"It meant that there was more space for a larger heart... so they could have an older child's heart," she said.
While in hospital with Isobel, she said the stark reality became apparent.
"There were four children waiting for hearts, and two of them didn't make it," she said.
Admitting that she wasn't previously on the donor register, Mrs Perry said that these experiences shifted her perspective.
"I believe you can't be willing to take something without being willing to give back," she said.
"My daughters would have both died if they hadn't got that heart... we got very lucky, twice."
