I don't know whether it's evidence of anything, he looks like the kind who buys all his girlfriends boob jobs, if they haven't had them already.
On the other hand, what kind of rich guy goes halfsies on a boob job with his struggling single mom girlfriend (or ex girlfriend) if he's just giving her a gift? That doesn't seem very romantic or generous, IMHO. Has information been released about when exactly CA and KM stopped seeing each other romantically?