I'm having hard time understanding why RP would still have BD on his phone plan if he was involved in a serious relationship with another woman. Any woman would think something was amiss if their boyfriend still had their ex on their phone plan. The fact she was still on his phone plan tells me that he had not cut ties with her and was still entwined in a relationship with her.
If you've been in more than a few relationships in your life, why is this so difficult to understand?
According to most stories, these two people lived together for a little more than two years. They only broke up in January/February. For all we know, keeping a cheap "family" phone plan that could expire any day may have been just as much a convenience to RP as it was for BD. (For some reason, we want to assume that she was destitute because he is a dermatologist and she is only trying to get her dental hygienist's license).
Also, there is a widely varying definition of what constitutes a serious relationship anymore. Back in the day when pictures required a special piece of equipment (camera) and cash to develop photos, people tended to take pics only of special people and special occasions. Today, with Facebook, Instagram and cellphone cameras, people take pictures of EVERYTHING, EVERYDAY, from their new shoes to the food on their plates. It's easy for outsiders to get the impression that this relationship was serious because, well, Kendra's Facebook page says so.
In actuality, this couple - judging by differing locales and outfits, were spending a lot of time together, but they obviously were doing so after knowing each other for a very short time. You're talking 2-3 months before Kendra announced a "serious" relationship on FB. In this day and age, someone on an ex's phone plane does not mean they are "entwined" in anything.
Lastly, eight months or so after breaking up with a woman I'd dated fairly long-term, I not only designed and created a food catering website for her - she also talked to me about her new relationship - a man she's now married to with a child. Trust me, you could create a whole scenario just by looking at our phone records listing many calls to each other (talking about her website), but nothing was "entwined" anymore.
Just sayin...