Did Voldemort and Bellatrix Fall In love before downfall?

Voldemort was incapable of love since he was conceived through the use of a love potion rather than through the love of his parents. Bellatrix was a vicious assassin as well as a devoted servant who fell in love with the Dark Lord. As a result, he regarded her as a Death Eater, yet he never loved her.

Now here is the catch Delphini (born c. 1998), often known as Delphi, was the daughter of Tom Riddle and Bellatrix Lestrange and a British half-blood Dark witch. She was able to speak Parseltongue because she was Lord Voldemort's only child, and after her father's death, she became the only known living successor of Salazar Slytherin.