Why do i feel bad for sleeping?

My twins are about 3 months old. They dont sleep very long at once so im pretty exhausted. Im a sahm and my mom came to visit this week. I pump. so She did the feedings the last two nights and i got 7 hours of sleep both nights. But i feel terrible for sleeping through the night. Shes more than happy about doing it because theyre her first grandchildren but i feel like i should be doing it since theyre my babies.

Sorry about this little rant but has anyone else felt like this for getting a little help