<human>: Can you succinctly summarize the text in 1-3 sentences?

(alternative account for privacy)

Me and my girifriend have been together for 4 months, and only recently started having sex about a week ago. We wanted to start before then, but we made sure she was on birth control and we both got tested. She took my Virginity and was more than willing to take part in this action. We made sure we were both in a safe environment and she helped me through everything. Overall, it was extremely natural and comfortable for both of us. 

Fast forward a week later and we end up home alone together. Since we are both college students who both live with our parents being home alone is a rare moment. Upon realization we had the house to ourselves for two hours, I started a make out session and after several minutes I asked "wana have some fun?". She got the memo, but hesitated initially. Ultimately we did the deed and she enjoyed it as much as I did. 

Fast forward another day and we are out hiking together and the topic of sex comes up. This is when the mentions that she really hopes our relationship doesn't become one where sex is expected, and expressed we should be making sex a lower priority over things like dinner dates, hiking, and general communication. 

Asking for more reasoning I realized that her previous relationship was ruined shortly after sex started happening. She mentioned that in her last relationship the guy expected nearly every time they were alone together that they would be having sex. It brings back bad memories when I brought it up. We have only had sex twice since dating. 

My dilemma is that sexual tension between us is almost inevitable in the future, and I somehow need to make sure she is more comfortable given her bad experience in the past. I really don't know how to keep the sex happening once in a while, but ease her worries of it getting in the way or ruining our relationship.
<bot>: Girlfriend doesn't want sex to ruin relationship because her past relationship fell apart. We both love sex and want to keep going, but dont want to make the same mistakes. Looking for ways to ease her doubts.