should I tell my sister in law!?

so myself and my sister in law were both TTC at the same time. she has been trying for a long time and just started medication to help conceive her first month just passed and shes not pregnant and devastated. I as well am TTC and it was the first month at first I was getting BFN and then today 10dpo I got a line on all 5 tests. now shes asking if I'm still getting negatives. I dont know if I should tell her or wait or what I should do what do you all think!? I dont want her to get so depressed or give up or be mad at me.

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