I get dressed

For a while I just stand there, looking at my hard-on poking out through the towel in the mirror, and seeing myself blush and not knowing what to do.

I then decide that my best bet is to just get dressed and pretend like what just happened did not happen, and I then pick out a nice shirt and pair of pants, put them on, leaving the shirt not tucked in to make sure that my erection is no longer visible, then I go out to the kitchen/living room area. Millie is standing with her back turned to me, and seeing how smooth her dress fits over her ass, and knowing it is because she is not wearing panties, I feel my erection hardening even more.

Millie turns around and smiles at me, saying:

"You look great Matt, you are becoming a handsome young man, but you need to tuck your shirt in."

I cringe a bit at this, but she walks up to me and starts tucking my shirt into my pants, but when she reaches the front, she sees the reason why my shirt is untucked. She looks at my erection pitching a tent in my pants, then says:

"You know Matt, you reacting to my outfit in this way is the finest form of compliment a man can give a woman."

I swallow hard, and even though I thought it not possible I feel my cock grow even harder hearing her say this.

Millie looks at my erection for a bit longer, then says:

"Well, Matt, I do appreciate this compliment, but we cannot leave the house with you like this, can we?"

I swallow hard again, sneak a quick glance at my step-mom's big tits, then shake my head.

Millie looks at my hard-on for a bit longer, then says:

"Now, what should we do with this?"

She keeps her eyes on my cock a bit longer, then looks up at me, catching me starring at her big tits, but ignores this and says:

"You got any ideas Matt?"