Fairy Tail Next Generation :the Dragon slayer Twins

Lucy and her guild mates have a party but her and nastu had fucked up and 2 months later she finds out she's pregnant and lisanan and nastu are dating now so she runs a way and 13 years later two older kids and littler one with 2 exceeds come requesting help to find there mother why do these two kids look like luce and why do they have so much powers

[Yeah you read the manga but I'm changing it that Mavis gave birth to her son Larcada]