Yes, while we play together, at least with my being in the room at the time, she does play alone about 20% of the time. She lets me know her date or plans in advance, but sometimes it is random, and I have no idea. She has a few male friends she sometimes travels with, and she enjoys one-on-one time with them alone.
One time she was working an on-call shift in the Cardiac Cath Lab and had a patient that had to be transported to a larger city hospital for a procedure after the cath procedure. The local ambulance transported the patient, but hospital protocol required she be in the ambulance due to the ...... the patient was on for the three-hour trip. She arrived home late and was on fire like a horny teenager. She was excited and told me about how she rode in the back of the Ambulance on the way back to town and how both the paramedics took turns riding with her in the back. She told me both of them were hot and had big cocks. She told me how the first guy got into the back and talked and then reached out and untied her scrub pants, letting him take them off her.
I got her bottoms off her, and her panties were a mess, sticky with cum. Her pussy was swollen and puffy, gaping slightly, and she had cum on the outside of her pussy and ass. She climbed up on top of me and ground her used pussy in my face telling me to clean her out.
When she plays alone, the sex between us is always super hot for two weeks or so afterward.