In her pussy

"Red! Pull out! Don't cum in my pussy, I could get pregnant!" Your mom says.

Too caught up in the pleasure, you soon jizz inside her. Contrary to what she said previously, when you finally do pull out, she simply lets out a pleasured sigh, pulls up her panties, and kisses you on the cheek before going back to doing the dishes.

Feeling satisfied, you head outside to go get your first Pokémon.