Had a married FWB who lived in another state and was extremely submissive (her husband was that dominant which is why she found me), I would usually give her some kinky things to do during the week and she would send me nudes and vids and just generally being ldr fwb type stuff.

Anyways, at a certain point probably about 6 months in we decided that she was going to fly out to meet me in person for the first time. So we planned the trip and got everything ready for about 3 weeks from then so she could say it was a "work trip".

Well I had the terribly brilliant awful idea of something for her to do for me before she left. I told her to go get a boudoir shoot done in a new set of lingerie that she bought to show me, and once she had the pictures to go to the post office and mail them to me, but I also told her to tell me when she got to the post office. Once she was there I told her I wanted her to rub her pussy until she came and then she was going to mail the photos, her panties, and her wedding ring to me.

She argued at first that she really didn't want to but I convinced her that she could claim to have lost it at the gym and that when she came back from her "work trip" she found it in her gym bag. She went along with it, and got her ring back a couple weeks later when we met up.