Told My Client We'd 'Work Out' Later Tonight

Just told my client I couldn't make it to the gym today, but suggested we could do a late-night session at her place instead. She laughed and said she knew what I meant. Fucked her against the wall in her hallway while she moaned and pushed back into me, felt so good I kept going until we both were done. Am I just supposed to keep it professional or is this normal? What should I do?