"When he rung up, he just said yeah, he's been named.
"I said: 'Oh good, good. Good on you - the 23, that's awesome.
"He said: 'No, I'm starting'."
Thinking her 20-year-old son was having her on, Sandra - who works as the club manager at her sons' Ponsonby Rugby Club - responded: "Oh shut up."
She said both boys were supportive of each other and still shared a room at the family home in Auckland.
"They've had to sleep in the same room together for blimmin' 19 years. Two king beds - we've got a house that they can have a bedroom each, but they're quite happy to share the same room. Oh well, if they're happy, we're happy."
The Ioane brothers have strong rugby links in both their parents; with Sandra being a former New Zealand Black Fern and Eddie representing Samoa in the famed Manu Samoa team of the early 90s. Their father is a coach with Ponsonby Club.
Sandra revealed she had even offered a place to stay for a Lions fan touring the country.
The man, only known as Alex, arrived ahead of the Lions and Blues match.
She called her husband to let him know she was bringing a Lions supporter home and about 10 minutes after they arrived, she introduced him to her boys - who Alex seemed to think he recognised.
"He was home for about an hour when I think he clicked."