anybody else dead bedroom after discovering infidelity ?

i’m in a lesbian relationship. i’m 19 and my girlfriend is 18. we’ve been together for a year and a half and are long distance during the school year. for the past 5ish months i’ve noticed girlfriend has been fairly uninterested in sex. when we’re not long distance, we used to have sex everyday in the beginning of our relationship and while apart we stayed connected through sexting and nudes. since i came home from school two months ago, she has been rejecting sex and make outs and blaming it on a low sex drive. a month ago, i discovered she’d been cheating for the past month. i stayed with her on the condition she go to therapy and have no more contact with her affair partner. directly, after i found out she cheated, she wanted to resume having sex again. we had sex once, two days after i found out she cheated. now i am back to being rejected and she has told me not to initiate sex and to wait for her to. i’ve brought it up to her that i feel rejected and insecure in our sexless relationship. she bought a vibrator to try and raise her sex drive but i suspect she hasn’t used it yet.