Wa'alaikum assalam! Ah rare tapi boleh happen, some mums do bleed throughout pregnancy, biasanya lighter je or different from normal period. Your BFF was lucky she didn't realise sampai quite far along! Honestly, kalau ada spotting atau bleeding masa pregnant, best to check with doctor terus sebab kena make sure baby okay, tapi some women really do have what looks like periods. Glad she and baby are safe sekarang! Maybe boleh ask her during her confinement period, sure she ada cerita to tell.