Jono Castano’s ex-wife Amy calls his new girlfriend Simone Holtznagel her sister

Amy and Jono Castano split in 2021 but there is clearly no bad blood between them as the influencer happily calls his new girlfriend her ‘sister’.

The ACERO gym co-founder, 32, wished Simone Holtznagel a ‘happy early birthday’ on Friday as the group of friends went out to lunch.

In a series of happy snaps posted to Instagram, Amy kept referring to the socialite and model, 29, as a ‘sister’ as the beauties shared a few bubbly beverages. 

Amy’s new boyfriend Aaron Evans also attended the outing.

The happy quartet were all smiles as they enjoyed the early birthday celebrations, at one point pulling out a frosted white cake topped with maraschino cherries. 

As Amy slipped into a low-cut white shirt and Simon a conservative black top, the pair posed up a storm.

‘HEBD to the sis I gained,’ the brunette beauty captioned one photo, while on another she wrote simply: ‘Happy early birthday sis.’

Jono debuted his romance with new girlfriend Simone in September.

The ACERO gym co-founder wished Simone Holtznagel a ‘happy early birthday’ on Friday as the group of friends went out to lunch

Their relationship became public knowledge after they were pictured kissing at Mimi’s that May, the celebrity hotspot owned by hospitality mogul Justin Hemmes, who is dating Simone’s sister Madeline.

The Castanos split in early 2021, but decided to keep up appearances before making an official announcement.

While the ACERO gym co-owners are no longer together, they remain friends and continue to operate their fitness empire together.

In a series of happy snaps posted to Instagram, Amy kept referring to the socialite as a sister as the beauties shared a few bubbly beverages

They are often spotted out and about, sharing meals and taking walks together. 

‘We would just like to say that we do really respect each other very much, and just wanted to say that we really appreciate your patience,’ Amy said in June last year, just a day after she debuted her romance with Aaron, 28. 

‘Obviously we have gone through a bit together, and we’ve had fifteen years and there’s no one else on this planet that I would love to continue this baby with that is ACERO.’

The estranged couple first met on MySpace 13 years ago, before later running into one another at a nightclub and falling in love.

Amy’s new boyfriend Aaron Evans, 28, (left) also attended the outing and was spotted getting close with her ex-husband Jono (right)

While the ACERO gym co-owners are no longer together, they remain friends and continue to operate their fitness empire together