The Grindelwald's & The Riddle's

What if Gellert Grindelwald didn't die at the hands of Lord Voldemort but actually became friends with him and became one of his deatheaters. Gellert Grindelwald & Vinda Roiser have two kids Gavin Gellert Grindelwald & Y/n Delila Grindelwald. Tom Riddle Sr. & Bellatrix Riddle have three kids Tom Marvolo Riddle Jr.,Mattheo Marvolo Riddle, & Taylor Marvolo Riddle. Gellert Grindelwald has arranged for his only daughter Y/n to marry Voldemort's oldest son Tom before her 7th year and Tom's 8th year. Tom has gone to Hogwarts since he was 11years old unlike Y/n who has gone to IIvermorny but starting her 7th year at Hogwarts married to Tom how will the couple get along? Voldemort has also made it very clear that the couple will have a little apartment to them selves at Hogwarts and are expected to have at least one child in their first year of marriage.

Author's Note I only own Y/n and her kids none of the other characters .