Cute little Omega going into his first Heat in September, he's confused, scared, but it's okay... his big, strong, virile Alpha father is there, he'll make it okay.
Big strong Alpha father unable to resist his beautiful virgin omega's scent, claims his first Heat, knots and floods his hole with his virile Alpha seed over and over until the boy's Heat his over.
Cute little Omega with a big, swollen belly screaming and sobbing nine month's later as he becomes a father on Father's Day, straining to push multiple babies out of his aching hole as his Father rubs his back and praises him for giving him so many new children even as the boy sobs and begs for it be over even as he gives birth to his sixth child somehow knowing there's at least one more still inside him and working its way towards his birth canal.
Alpha father who feels his cock getting hard at how fertile his sweet boy is, he's going to fuck him so hard when he's finished giving birth and claim every Heat the boy has forcing him to birth litter after litter of big, strong babies.