**This is an ageplay one-shot, that involves a grownup in pull-ups. If you don't like it, don't read it. Also, it is a boy/boy fanfiction.** (Mark/Tyler) Tyler gave him a soft, reassuring smile before he pressed a small kiss to Mark's hair. "But I think you look adorable." He replied softly, before one of his hands went down towards Mark's bum. He gave it a light pat, watching as Mark's cheeks heated up even more. "No one's gunna know. Only you and I. Promise." He reassured him in a soft voice.