Even that would be fine in Germany but it's a good point.
If a complaint was made it would not be fine in Germany
The age of consent in Germany is 14, as long as a person over the age of 21 does not exploit a 14- to 15-year-old person's lack of capacity for sexual self-determination, in which case a conviction of an individual over the age of 21 requires a complaint from the younger individual; being over 21 and engaging in sexual relations with a minor of that age does not constitute an offense by itself. Otherwise the age of consent is 16, although provisions protecting minors against abuse apply until the age of 18 (under Section 182(1), it is illegal to engage in sexual activity with a person under 18 "by taking advantage of an exploitative situation"[30]).