My step sister had a baby 4 months ago after wanting one for a very long time. She is 38.
Her partner did not want a baby and so she left him, only for him to change his mind so they got back together and she fell pregnant immediately.
Since the baby has been born, she keeps going out without him and my step mother is looking after him most days despite my step sister (SS) being on maternity leave. She also goes out atleast 3 evenings a week to have drinks with friends, leaving him with her partner. This has been happening since 2 weeks after his birth.
My Dad is exhausted as the baby is at their house everyday, including the odd overnight. But he won't say anything. He has a few health issues and needs some rest- he's 71. My step mother won't say no to her although she's exhausted too. They take care of my children twice a week after school so that I can work which I'm extremely grateful for (I'm a single mum) but I can see they're tired out and I feel guilty when I know they've had the baby all week. They say it's fine for them to look after my children for a few hours twice a week though and I don't expect them to provide a hot meal, they have sandwiches on these evenings.
However, they only have so much energy and my step sister is seemingly happy to zap it all from them. I have asked her if she's ok- thinking she must have PND but she keeps talking about how much she loves maternity leave. I think she's being honest- I think she's enjoying using the time for going out and having fun. Although, her partner doesn't seem very happy since the baby came along- I don't know if it's because she keeps leaving him with him in the evenings often when he's been to work. He did mention that when he gets home from work she's hardly ever in so I know he's getting home and cooking an evening meal for them for when she returns with the baby.
I'm a little shocked at the way she's behaving throughout maternity leave as she really, really wanted this baby. She's acting like she's enjoying her baby when I see her, but tbh, i think she's bored. She's always needed a lot of attention from her mother also. I'm concerned for my Dad overall, who has directly told me that he's exhausted by my step sister constantly being there/the baby being there. I've suggested he say something to her but he then shrugs it off and says it's fine.
I know it's not fine though- do I say something?