What is the meaning of「って」here?


I have hard time following the dialogue by a single character from a certain
manga.

> 貴方は安達垣愛姫を選ぶ
>
> でも、それは復讐のため
>
> 恋じゃない
>
> でしたら、わたくしと恋をしたって
>
> 浮気にはなりませんでしょう?

How can I understand the fourth and fifth sentence? Does the「って」in the fourth
sentence mean "if"? Is it something among the lines of

> If that's case, if you fall in love with me, then it will not become affair?

Perhaps this「って」is a colloquial topic marker.

> If that's case, speaking of falling in love with me, it will not become
> affair?

I'm not sure what is the correct meaning of「って」in this context.




The second definition of 「たって」 [here
1](https://www.google.co.uk/search?q=%E3%81%9F%E3%81%A3%E3%81%A6%E3%81%A8%E3%81%AF&source=hp&ei=481dYOzGKoSSlwTOt6-wCw&iflsig=AINFCbYAAAAAYF3b8znR5qD7p_7iVwsjKIDD8ynCNV0F&oq=%E3%81%9F%E3%81%A3%E3%81%A6%E3%81%A8%E3%81%AF&gs_lcp=Cgdnd3Mtd2l6EAMyBggAEAQQCjIECAAQHjIECAAQHjoOCC4QsQMQxwEQowIQkwI6CAgAELEDEIMBOgsILhCxAxDHARCjAjoOCC4QsQMQgwEQxwEQowI6BQgAELEDOgQIABAEOgIIADoICAAQBBAKECo6BggAEAQQHlCGFFiMKWD8K2gCcAB4AIABgAOIAY0IkgEHNy4xLjAuMZgBAKABAaoBB2d3cy13aXqwAQA&sclient=gws-
wiz&ved=0ahUKEwisxP629c3vAhUEyYUKHc7bC7YQ4dUDCAk&uact=5) (I hope it shows up
properly) is 「たとしても。ても。」 Basically, たって is a slightly more colloquial way to
say 'even if'. (I believe it's derived from 「～たとて」.) It's usually made with
the past tense plus 「～って」, but with い adjectives it goes after the 連用形, as in
「赤くたって」.

'In that case, even if you fell in love with me, it wouldn't be cheating,
would it?'




The second definition of 「たって」 [here
1](https://www.google.co.uk/search?q=%E3%81%9F%E3%81%A3%E3%81%A6%E3%81%A8%E3%81%AF&source=hp&ei=481dYOzGKoSSlwTOt6-wCw&iflsig=AINFCbYAAAAAYF3b8znR5qD7p_7iVwsjKIDD8ynCNV0F&oq=%E3%81%9F%E3%81%A3%E3%81%A6%E3%81%A8%E3%81%AF&gs_lcp=Cgdnd3Mtd2l6EAMyBggAEAQQCjIECAAQHjIECAAQHjoOCC4QsQMQxwEQowIQkwI6CAgAELEDEIMBOgsILhCxAxDHARCjAjoOCC4QsQMQgwEQxwEQowI6BQgAELEDOgQIABAEOgIIADoICAAQBBAKECo6BggAEAQQHlCGFFiMKWD8K2gCcAB4AIABgAOIAY0IkgEHNy4xLjAuMZgBAKABAaoBB2d3cy13aXqwAQA&sclient=gws-
wiz&ved=0ahUKEwisxP629c3vAhUEyYUKHc7bC7YQ4dUDCAk&uact=5) (I hope it shows up
properly) is 「たとしても。ても。」 Basically, たって is a slightly more colloquial way to
say 'even if'. (I believe it's derived from 「～たとて」.) It's usually made with
the past tense plus 「～って」, but with い adjectives it goes after the 連用形, as in
「赤くたって」.

'In that case, even if you fell in love with me, it wouldn't be cheating,
would it?'

