Attending a birthday party

Q: My wife informs me of an invite to a surprise birthday party - her sister is turning sixty tomorrow.

Would it be correct to attend, or allow family to? The sister is visited at least every fortnight, and the intention of paying a family visit could be used: what is the Shari stance?

Amount to pay back when paying back a loan in a different currency

Q: My father borrows money from one of his friend in Pakistani rupees 2 Lac which was approximately 1235$ but at that time I was not in a condition to clear his debit and I take the responsibility to clear my father's due after some time. Now I'm stable to clear my father's due but now the price-hike of every thing. Should I pay my father's due according to pakistani rupees or $. My father too the money in Pakistani rupees.

Three talaaqs

Q: The problem is that 10 years ago I divorced my wife twice and 18 months ago I divorced one time and on May 16, 2023 I divorced three times. Now my wife and me are separated from each other. So I want to ask that divorce happen to me or not?