Take the lead

Piper: Well, you know, I know with Wyatt (Wyatt is piper's son) and everything lately that you've had to, you know, take on more responsibility for all things wiccan lately, but, um... (Piper looks around) you know, you don't need to shoulder the burden all by yourself anymore.

Paige: Sweetheart, it's not burden. That's why I quit my job after all.

Piper: Yeah, but still, I mean, it's not fair to you. Now that I have Leo being Mr. Mum, I've got a little bit more time on my hands.

Paige: Oh, well, I don't mind taking the lead.

What does "take the lead" here mean?