i need help!

ok here is the situation, me and my "other" have been together for awhile and we have a pretty good relationship, but for the past three months or so her step brother and step sister moved in with her already big family(her mom,dad,2 brothers already)and her step sister has been sharing the room with her, and we have had no alone time at all or barely any at all...and we talk on the phone a lot because shes there at home, and if thats not bad enough that her step sister is always near her so we can't have a private conversation now she's got to where she always wants her cousin over there who always is yelling and butting into our business...and i understand that its her family but i do want a little alone time, i mean am i being selfish but her cousins mom always tries to get her to come over to my 'others" house because she feels the same way because she can't ever get alone time with her husband...i have tried to talk to her about it before and calmly saying i just wish we could have some alone time but then when we try her cousins always there...so what should i do? thanks for reading my discussion and i hope you all have a great day!