My partner (25F) had a great opportunity to do a sponsored Master’s project that involved a lot of traveling around the East Coast of Africa and Madagascar. Unfortunately it meant we would be apart for quite a while but it was too good of an opportunity to pass up.
Around this time we had started exploring more in the bedroom, she was a bit hesitant at first but was eventually comfortable exploring some bondage/bdsm and eventually having a threesome with another guy. We both really enjoyed the experiences and knew that it was going to be difficult not having that physical part of the relationship. I suggested that she could have her half of the relationship open while she was away, I always enjoyed her getting attention and her being with other guys was a turn on for me (not in a cuckolding way though). So we ended up agreeing to have an open relationship while we were apart.