Is this unprofessional?

Wanted to ask a quick question if this is the norm or if it’s unprofessional. I recently wrote a feature piece about a brand (I’m a journalist) and someone from a PR agency initially reached out to me to write about the brand and coordinated the interview for me. But I really want to stay in touch with the comms person inside the brand itself, and so I asked the PR person if they can send me the contact of the brands comms in case they leave the agency and I won’t be able to reach them anymore.

Is this okay? Or is it overstepping/crossing boundaries?