i would use two pen names. However i have spotted some authors who use one name and write both erotica and romance.
The thing is romance and erotica authors are two different audiences. If you write very steamy romance maybe you could get away with using the same name for erotica.
I just wouldn't mix genres under one name.
Things i'd consider -
Would i be happy for my romance readers to know i write these erotic stories
Would i be happy for my family/friends to know i write erotica too
Would it affect my brand, if i became a huge bestselling erotica author or romance author would i want the two connected.
The thing is romance and erotica authors are two different audiences. If you write very steamy romance maybe you could get away with using the same name for erotica.
I just wouldn't mix genres under one name.
Things i'd consider -
Would i be happy for my romance readers to know i write these erotic stories
Would i be happy for my family/friends to know i write erotica too
Would it affect my brand, if i became a huge bestselling erotica author or romance author would i want the two connected.