If by "run out of it" you are implying that there is finite matter in the universe, then yes. For practical purposes, no.

If she cheats, she belongs to the streets, bro. You can't make people change. Sounds like she's using you as her ol' reliable who will always be there for her. Don't enable her behavior, as hard as it may be, you should let her go. It's unfortunate that there are kids involved, but in the long run it'll likely be a healthier environment for them when they are with you if you don't have this kind of emotional turmoil and distraction.

Lol this is a satirical post in response to a previous thread from an opposing perspective