Causing a child to watch a sexual act
(1)A person aged 18 or over (A) commits an offence if—
(a)for the purpose of obtaining sexual gratification, he intentionally causes another person (B) to watch a third person engaging in an activity, or to look at an image of any person engaging in an activity,...
Engaging in sexual activity in the presence of a child
(1)A person aged 18 or over (A) commits an offence if—
(a)he intentionally engages in an activity,
(b)the activity is sexual,
(c)for the purpose of obtaining sexual gratification, he engages in it—
(i)when another person (B) is present or is in a place from which A can be observed, and
(ii)knowing or believing that B is aware, or intending that B should be aware, that he is engaging in it, and
(d)either—
(i)B is under 16 and A does not reasonably believe that B is 16 or over, or
(ii)B is under 13.