I don't think it's her being happy to be a housewife, as she's pretty tit at that (given chicken man seems to do the majority of the cooking), it's that she's entirely happy to sit and laze around without a care in the world while someone else works long hours to keep a roof over her head, provide for her and her child(ren) and keep taking her on holiday.
She didn't pay for the multiple holidays to quite expensive looking resorts enjoyed by her and Richie, she didn't pay for the new bed and decor in Chicken Man's house.
She's happy to do the bare minimum in terms of being financially responsible and is willing to do the 'stuck at home' role to keep her the way she likes.