The former Big Apple model who fatally shot her day-trader husband in Florida before turning the gun on herself feared he would divorce her after she came clean about cheating on him, his brother said Monday.

Arben “Benny” Krasniqi, from Scarsdale, told The Post that the family had noticed several troubling signs from Sabrina Krasniqi, 27, who shot her husband Pajtim, 34, five times on the balcony of their upscale Florida condo just after midnight on Wednesday.

A former NYC model, Sabrina Krasniqi, fatally shot her husband, Pajtim Krasniqi, in their Florida condo before taking her own life, fearing divorce after admitting to infidelity. The tragic act has left their grieving family searching for answers and mourning an irreplaceable loss.

Pajtim Krasniqi's brother said their family had noticed 'red flags' about his wife Sabrina Krasniqi, but thought the couple 'were in love' and never imagined such a tragedy was possible

Sabrina Krasniqi allegedly murdered her husband Pajtim Krasniqi, bodies found on a balcony in Hallandale Beach.

The brother of a Florida day trader who was shot and killed by his former model wife in an alleged murder-suicide revealed that family saw red flags in their relationship, but never thought it would end in the gory slayings.

The former New York City model who fatally shot her day-trader husband in Florida before taking her own life feared he would divorce her after she came clean about cheating on him, his brother said Monday.