Gaining

Is it...supposed to cause lactation? lol

Sounds like the best kind if you ask me.

An increase in libido means more calories burned which means she needs more food to stay at a "healthy" weight. Lol

And if it increases breast milk supply then again she needs more food for the calories and right nutrients to be used to produce the breast milk.

Conclusion, yes it is an appetite stimulant. Directly for the libido and indirectly for ladies' waistlines. Lol