SQL & PL/SQL :: Copy Data From One Table To Another

I have two tables namely PERSON and WIFE. I want to make WIFE's data available in PERSON table while keeping entries of WIFE maintained and at the same time adding some the values of PERSON against the data of wife.

PERSON Table
PK NAME ADDRESS IS_MARRIED
1 John ab city Y
2 Varvatos cd town N
3 Smith ef town Y
4 Henry gh city Y
5 Lynda gh city Y

WIFE table

PK PERSON_ID (FK) NAME
1 1 Alice
2 3 Rosy
3 4 Lynda

Now i want to copy data of WIFE table into PERSON table like this PERSON table

PK NAME ADDRESS IS_MARRIED
1 John ab city Y
2 Varvatos cd town N
3 Smith ef town Y
4 Henry gh city Y
5 Lynda gh city Y
6 Alice ab city Y
7 Rosy ef town Y

As in the given example you might have noticed that ADDRESS of wife is same as of her spouse and same goes for IS_MARRIED column. Moreover, the PK is also not duplicated. How to go about this?

Another important factor is Lynda already exits in PERSON table, therefore, i certainly don't want to duplicate her entry.