On the right, tap the sharing button.

It looks like an arrow pointing to the right at the bottom of the share to menu that pops up tap duet.

Tap the red button at the bottom of the screen to start recording your video.

Yours will appear on the left and the other person's will appear on the right.

When you're done, tap the check mark to the right of the recording.

Simple.

Add any text stickers or effects you might want right up.

A caption and post.

My mom's always talking to me, telling me like, Oh, receipt brutes.

She has no idea actually understand her, because if she did, I would like you have to listen to her.

No way.