Here's what I imagine is going on in this:
It's lunchtime, and your Mama, who is also a teacher, has called you into her classroom alone to talk. You ask her why, and she puts her hand on her head in exasperation and anxiously looks over towards her desk at the front of the classroom. On it sits a large pile of bento boxes with notes on all of them.
"Y-Y-you gotta help Mama out, sweetie! P-Please! A bunch of admirers snuck all these bento boxes with love notes attached into the classroom! You know how much I hate to waste food, but I can't eat all of that! Take a few of them! My already ample belly is already spilling out of my clothes enough as it is! It'll be so huge and stuffed if I eat everything, and I'll get so much fatter! Please!"
Without hesitation, you lean forward, rub your mama's ample belly and give her a little smooch on the lips, much to her surprise. In fact, she's completely stunned.
"I assure you, Mama, that all of us admirers in my secret cooking club pre-emptively agreed that we fail to see how that could possibly be a problem," you whisper into her ear as you continue to rub, and she begins to sigh in arousal.