Hi, honey. Mommy's got a surprise for you. I know what kind of ladies you like looking at-- bigger ladies, more mature ladies. And I know you like looking at Mommy...! So today, Mommy's going to show off her pretty lingerie for you! But the rules are, you can't touch me... and you can't tell anybody. This is our secret. I turn around and pull up the lacy lingerie to reveal a tiny thong trying to cover my big BBW ass. I can't believe I'm doing this-- can't believe I'm showing off like this for my own son! I know I said you can't touch me... but I didn't say you can't touch yourself! I smile and tease and show off and encourage you to stroke yourself, talking about some of the dirty thoughts you might be having. And I enjoy it so much, that I encourage you to stroke until you cum for your own mommy! But remember... this is our secret.