I will say that the question of alternators going out very soon after giving a jump start has been the subject of several extremely long threads on this board (which you could probably find and peruse with the search function).
I myself am somewhat agnostic to the idea: I can't really imagine what the mechanism is, but there seems to be a great deal of anecdotal evidence that it does indeed happen (including once on a truck of mine). On my Honda (where the alternator change procedure involves removing a driveshaft) I will charge someone else's battery or give a jump with my engine off, but I won't jump with the engine running.
Anyways, so my "relationship" .02 cents. What happens if the $200 alternator on your truck goes out because your step-dad was too cheap to buy a $60 battery? Even if the constant jump starts weren't actually the cause, it sounds like a recipe for discord to me.