Help me find the song

Moleli tumeshamzika ona sasa hatuko naye tena. Ukimwi kweli unatisha tuaipookoka nakwambia tumekwisha...

I'm looking for the song. My sister was humming it and I was hit by nostalgia. We've been trying to find it but so far no luck. Haiko YouTube na hata Google hawajui wth I'm talking about.