<human>: Me and my gf have been dating exclusively 5 months now. And she has maintained contact with her ex to present day. She was still sleeping with him when we were just getting to know each other. About two months in to the relationship i expressed my concern and told her it made me uneasy. She understood why id feel that way. 

So fast forward a month later i find out that she is still seeing him about once a week. She just didnt want to tell me because she knew it would upset me. Other than this issue our relationship is going well.

I dont know what to do...

Can you provide a brief overview of the text?
<bot>: gf still talks with most recent ex and stopped telling me because it upset me. Does anyone have some experience they could share with me? In regards to what i should do or expected outcomes of this?