I’m gonna attempt to solve it.
...
Oh, seems heltonjon had the same idea as me while I was typing.
Spoiler
The young woman contracted Covid-19. Due to the lockdown she is fearful of her financial prospects. Knowing that the disease is much less forgiving on elderly people, she decides to pay her old Grandad a ‘visit’. After all, she happens to know that he intends to leave her a considerable sum of money when he leaves. So she visits the old geezer, gives him a kiss, a cuddle and a few coughs in the face and then leaves, popping a few Lemsip tablets in her mouth on the way out.
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...
Oh, seems heltonjon had the same idea as me while I was typing.