Help.. what should i tell her?

My sister in law got pregnant this month and she announced to everyone once they knew from excitement...

Anyways, we talk alot about our cycles and she knows that i use tests alot before i get my period..

Now I'm pregnant but hubby and i decided not to announce yet till after our first appointment after 2 days so that we also give them time and not acting as if we're trying to steal the spotlight..

I didn't even tell my mum yet and she must be the first to know with my mil...

Now my sil is texting me and asking if i saw any faint line and hows everything.. i already missed my period date and saw the bfp but not ready to tell her or announce yet..

+ i don't want to lie and then announce this pregnancy and she realizes that i lied to her 🙄

Im very confused.. what would you tell her if you were in my situation and you don't want her to know yet??

Would you lie?

Updates:

Thanks ladies for your advice and support... i ended up telling my mum and then telling her 😅