He's never home

Hi guys, so my fiance and I recently bought a house. We don't have any kids together, and we are TTC. I work shifts and he works normal 8-4. He always goes to his family home almost all the time when I'm on night shift, he claims to be bored since I'm not around, but my concern is why did he even buy the stupid house? What is it that he gets up to when I'm at work and he's home with his family? It really annoys me that he always makes my work an excuse to go home. Everytime he tells me he's going home I feel like flushing the stupid prenatal vitamins down the loo, I feel I'm wasting my time, what if he's always leave even when the baby is here. 💔😭😭