Not enough sex

Hey guys,

When my fiance and I first started dating and he had his own apartment, we had sex quite often. Everytime we saw each other which was pretty much 4 times a week. Then he decided to move back in with his parents to save money for a house. Our sex life declined to maybe once, sometimes twice a week. I confronted him about it and his excuse was that he's back at his parents house with little sisters so he didn't feel too comfortable doing it there. Which I understood and felt was a necessary sacrifice for our future. We finally have a house and it was going great for the first 2 weeks. We had sex a lot. Then it started deciding again, and the past 2 weeks we only had sex twice. Which I'm really sad about because I absolutely love our sex. The best sex and orgasms I've ever had. I don't know what to say if I end up confronting him about it, I don't want to feel needy. Any advice would help, really.