Cumming with her:
1) Cumming in her pussy
2) Deep in her ass
3) Directly on her pussy, with her spreading her lips open with her fingers (think Penthouse centerfold spread). Reinsertion after this is also very, very sexy.
4) In her mouth or on her face
Cumming for him:
1) Deep in his ass
2) In his mouth
3) On his hard (or soft) penis as he jacks. (Think missionary position, with some spray making it up his chest, after I've finished with him in missionary).