The sandwich-making brothers from North Wales, who stunned the judges by performing an opera number on Saturday's (April 20) show, commented that their "outrageous" nan could be a star-in-the-making following her antics backstage.
Asked if she could snatch the limelight from Maloney's nan - who became an unlikely celebrity during his time on X Factor last year - Richard replied: "Who knows? Nan has a way of being outrageous, so the sky's the limit for nan I think.
"It depends on how much camera time nan gets, because she does enjoy it. She gets carried away."
Revealing how their nan celebrated their Britain's Got Talent appearance at the weekend, he continued: "It was nuts. She set up a buffet!
"We were quiet the whole way through [the episode], then as soon as we're mentioned she starts screaming. So we recorded it and we were rewinding it and playing it again so nan could get it out of her system.
"When she reached the point where she could no longer talk, then we had a really good listen to it. You could only imagine if she was bowing and going mad at the audition what she was like when we were on the telly."
The boys also joked that they will be enlisting the help of Ant & Dec to make sure the excitement doesn't get too much for their nan if they make it to the semi-finals.
"We're going to do a printout and give it to Ant & Dec saying the guidelines to keeping nan stable," Richard said. "We've learnt them over the years. Whenever we're singing, she gets really hyped up."
Adam jested: "I'd be nervous if I was them".
The brothers told us that they are hoping to "spread classical to people who are younger", if only so that the next time they go to the opera they are not met with "500 grey heads staring at us".
"We've talked about singing some modern songs in a classical way," Richard revealed. "We do enjoy pop music, but we like to sing classical, so sometimes we try and throw the two. We sing Adele and Bruno Mars, things like that, in our sort of style."
Richard and Adam also admitted to being "totally and utterly obsessed" with fellow Welshman and Voice UK coach Sir Tom Jones, confessing that they had considered auditioning for the rival show.
"We've looked at The Voice and things like that, it was just the fact that we found a tent in the middle of Morrisons car park for Britain's Got Talent," Richard said, with Adam agreeing: "It was like God sent a tent down."
Britain's Got Talent continues Saturday (April 26) at 7pm on ITV.
Photo gallery - Britain's Got Talent episode two auditions: