Wow your husband has a cheek! Expecting you to run around after him and his dad like a skivy! Of course he does not want to move out. He has his bestie and a live in maid service right there whilst he sits on his ass.
Personally I would move out, as a single woman, your kid will get over it. It's not like she can't stay with dad half the time if you leave and stay nearby. Plus it does damage to her seeing you stay and tolerate his shite. She may grow up thinking its normal for a woman to run around after men like this.
Alternatively, stop doing any cooking or housework that is specially for his dad (washing, any extra cooking ect) And tell your partner that if he wants to stay then he has to take sole responsibility for that stuff. And that he also pick up his half of the housework in general. And look for a job. Even if it's just something part time. If he doesn't, get gone.
Sex wise...do you actually want to shag him? Also,
does he release your needs? No. So why are you helping him and him not you? I'd tell him you arent doing it anymore as you feel uncomfortable doing so in his fathers house. Bet he'll soon bloody move out then xD
Ok weight wise: Exercise gets you fit and that helps with weight loss but I found that actually losing weight is 90% about diet. Evidence wise, I took up walking for 1 hour every day six days per week and felt a lot better for it - but lost no weight. None. But when I changed my diet I dropped two-three pounds per week. So instead of prioritising the treadmill I would look at changing your diet. This might be hard if you are cooking the meals for everyone as you may have to cook separate meals for you. But if you want to lose weight then it's a necessity to eat healthy. I used weight watchers/slimming world as a guideline personally.