Cadet: what do you mean "cannot be meeting any of his needs while he is in a relationship"? As in I shouldn't? We will live under the same roof so I am still cooking his meals, doing the laundry, and buying him things, cleaning the house, taking care of his daughter. Those are needs too aren't they?
Yes and so he has the best of both worlds, you take care of those needs and he has an OW taking care of other needs. That is called cake eating and will help to perpetuate the affair.
When the light of day get shined on the affair she may not be so desireable.
But right now I would guess she is an affair down fulfilling some fantasy need of his.
Right now I would suggest you continue to gather information, get the DR book and read it and just be still and do nothing.
You have lots of time for action and making the best choices.
