Linds, I leave mine together quite a bit throughout the breeding season,as I do with many snakes.
There is a slight risk, but I've never had a problem,although I have heard of "accidents".
Female hogs get ravenous pre ovulation, and will jump at anything that moves, so certainly don't feed them in the same bin, but I don't need to tell you that.
Linds, Hognose are more known for eating their own eggs than their mates. You need to get the eggs out fast with some of them.
That's one reason albinos are still so expensive.
My friend Steve Hammack in Texas was the first guy breeding albinos well over a decade ago, but his female kept eating her own eggs, and that kept demand high and supply low.
Hogs should be mating in April to May with first clutch eggs common in May . They often double clutch.
I don't know if you recall but last year I got two clutches totalling 47, in a one month period, from the same female... That is an extreme however.
Unfortunately this species also seems prone to egg binding which causes breeders a fair bit of grief.
Here's my two clutches from last year

Above are some of mine during winter brumation
and below a hatchling....the whole reason I keep them.
[img]//www.ssnakess.com/photopost/data/500/18011590hoghatch03-med.jpg[/img]