Vincent Immortal?

[Mercen-X]

In the game it mentions that the ancients that were infected with the Jenova disease turned into monsters. He was married to Lucretia. Lucretia was pregnant with Hojo's baby during the time of Hojo's experimentations. Vincent let Hojo inject his unborn child with Jenova cells (that was within his wife). This child was Sephiroth. The sin that Vincent mentions he needs to attone for is Sephiroth getting injected like that. Hojo is in fact Sephiroth's father. Somewhere along the line Vincent decided against this experiment and Hojo shot him. Vincent could have left earlier but didn't. When Cloud sees him Vincent decides that maybe it is time he did something about it so thats why he joins the group.

None of this explains Vincent's awesome gear.
Vincent never mentioned any union between he and Lucretia. Lucretia never mentioned any union between she and Hojo. I've already seen that part where she talks about the exp but I don't remember her mentioning anything about love. She was devoted to Hojo and his work. Vincent admired and loved Lucretia from afar like a loyal knight. He tried to reason with Lucretia about the exp, he never said anything about professing his love for her.
I don't recall anything in the game mentioning the J-Cells having a Lazarus effect (resurrection) on the dearly departed as it's been suggested by one in this thread.