There is an easy way to determine if sending photos is pursuing. Are you attaching an expectation or hope of your W reconsidering her choices? If the answer is yes, I'd consider that pursuing. If the answer is no, then it is probably not pursuing.
The answer probably varies in each set of circumstances. I'd venture to bet that more often than not, it is pursuing. That is up to you to determine.
Me:45 ExW:48 M:04/97 3 Bombs & 2 ReCons 1st BD 11/10 D Finalized 4/20 D-16 S-14 Going in one more round when you don't think you can. That's what makes all the difference in life.~Rocky Balboa