Long back story here - my parter lived with this woman they split up but stayed friends with benefits for years. A couple of years ago he was in her part of the world on business and planned to stay at hers . I wasn’t happy with this -I thought they’d end up in bed. He dumped he over it- but actually ended up not going there. We got back together -only split for a cpl of weeks. Fast forward to his birthday last week . I’d tried to make it the best birthday possible under the circumstances. We had a lovely day. I left his around 7 .Then I find out later in the week that the ex phoned him during the evening and he spent the rest of the nite on the phone to her. I can’t believe she rang. I’d never call an ex on their birthday evening if they were in a relationship -I wouldn’t want to rock the boat and possibly upset the new parter. As usual he’s saying it’s me -I’m unreasonable and so on.