Write a question about the following article.

Then from 630am to 9 am she was texting the same number . So I got pissed and I called her out on it she denied then finally after I gave her all the facts she admitted its some girl she met online and she s been curious to be with another girl . I feel betrayed . She let another woman touch her and get intimate with her without my knowledge .

Question:
Why is the narrator so mad at their partner ?
OPT: [i] They are calling someone .; [ii] They are on dates with other people .; [iii] None of the above choices .; [iv] They are messaging someone else .;