A very clever alien..

[The Architect Of Fate]

So he will simply make shit up as he goes along to negate any evidence. Lol, you can disprove anything when you can simply make things up to change scenarios on the fly.

I don't care. The alien father is a deduction machine. You atheists should find your way out of this mess with deduction only

Sorry that's not the way we're playing, And I don't care if you don't care

Instead 

The father finds their shit and is able to match it perfectly to the food as the aliens throw their shit at the walls
There was also security caught them in the act 
Oh and their stomach is see-through and the food totally visible
And their breath perfectly retains the smell of the meal 
And tons of DNA is left where they dropped some of the meal on the floor when it fell from their mouths
He's able to dissect an alien parasite that feeds on their shit but perfectly preserved the DNA and is able to make it to both the food and the kids.
The Fathers able to create a temporal lense that lets him, peer, through time and he sees them eat the food 
He creates the helmet of all knowledge that allows his conscience to be in all points in time and he sees the act 

See if you can make stuff up to negate the evidence. I can make up stuff to solve it. Too bad this is futile in your quest to try and get out of having to give any actual evidence of your magic man in the sky and your claims about him. Stupid games won't help you