I can understand you feeling anxious about your therapy and only you know if seeing her 3 times a month will be ok with you. I see mine fortnightly just now and that works ok for me, so your Ts holiday pattern would be fine for clients like me. It doesn't sound like it's fine for you though and when I needed mine weekly I hated when she went on holiday.

In saying that, it doesn't mean her work isn't a priority for her, just maybe not her main priority? It's ok that she wants a different work/life balance - and if she has a holiday home, it's ok for her to want to spend time there too. It's equally ok that you have feelings about it but it doesn't mean she's done anything wrong.