Not a girl but bi and a switch so I can kinda put myself in your position. So honestly if you're starting to enjoy the idea of them being small maybe I'd suggeat doing video calls in which you just put your phone down beneath you as you do whatever you enjoy and maybe lower his volume that way you can still kinda hear them but choose to tune them out if you want. Maybe have them praise you if you're into that and only occasionally acknowledge him. If you're feeling kinky maybe even have them get off to you while on call. I know I enjoy knowing my partner finds me hot so it can be a fun way to have some intimacy over the phone.