This happened a couple of years ago. I had a FWB for a while that was married. Her husband is a jerk in many ways and treats her badly. Unfortunately things got complicated and we had to part ways.
I got a text message from FWB the week before Father’s Day asking what I was doing. I told her I had no plans, just chilling by myself (long story as to why). She wanted to know if I was going to be alone in the late morning as she wanted to stop by and give me a gift. I said yeah, I’ll be alone. I didn’t have plans until the late afternoon. We had not seen each other for quite a while. I wasn’t sure if she was going to stop by and just give me a gift, or if she was planning some other activities.
Father’s Day morning I showered, had breakfast, and was just relaxing when FWB messaged me that she was going to stop by and asked if I was available. I replied I was and would leave the front door unlocked so she could park and just come in. She showed up like 10 minutes later.