1. In my opinion, boas should be quarantined for a min 6 months. Introducing new males to females after having them in the collection for only a few months is sketchy in itself. It doesnt matter who they come from either.
2. Maybe the male is courting and breeding, is he producing sperm? Doubt it. The most likely scenario is slugs. Slugs are much harder for the female to pass and therfore more stressful on her. Especially a full litter of slugs.
The "in the wild" analogy doesnt hold up. They also eat live in the wild, that doesnt mean we should feed live.
With that in mind I agree with the above poster.