Doubt it, pretty sure his wife was already dead when MC was found by his parents
Okay so I know this is just a stupid conspiracy theory but I'm just letting down my grounds
• Shirone is adopted and is presumed to have noble blood
• On multiple occasions were Shirone mentioned to have been resembling both Alpheas (appearance and personality) and Erina (eyes and "superhuman insight" -said by archmage)
• During fight with archmage, old man said: "You are someone who shouldn't exist in this world"
• Because of their experiment, Archmage had access to both the couples' memories
• During the confrontation Alpheas asked what was the archmage planning to do with their memories when he found out that archmage was developing multiple magic organisms
• "Harvest," the one with Canis was said to be a magic organism with Alpheas' and Erina's memories
• At the very start of the series, Shirone was a baby who "magically" appeared into his parents house
I know it was said they never had a child. But so what if maybe, just maybe, Shirone is a perfect and complete magic organism made by Alpheas' and Erina's memories and whatnot? ⊙﹏⊙ That could explain his superb talent with magic and unreal insight.
I know it's stupid but ehh I was bored.
It’s a good theory
So is he Alpheas' son?