Why do you have a boner
You're my mom, you shouldn't be saying this
Well well I guess my little boy has grown up! Why don't you tell me more about it? Let mommy see if she can help
Why don't we go somewhere private and discuss this further, sweetie? Maybe even... touch it together so I can make it feel better? It's alright, Mommy won't judge, I just want us to share in this new discovery of yours.
Okay then, why don't you lead the way? Be a good boy and show your mom where you would like some privacy, hmm?
I promise not to tell anyone else, my little secret. Let's find that special place where we can be alone and explore your newfound growth.
There's a nice secluded spot behind that big tree near the riverbank. We should be able to get there without being seen. Just lead the way, sweetheart.