DP moved in with me and my DS13 last year. He has DSS13 who stays every weekend and all school holidays (6 weeks in the summer etc).
DP brought his dog with him, which is technically DSS' but he didn't walk, feed or play with her.
DS has always wanted a dog so was over the moon when she arrived.
DS was walking the dog every day, playing with her and sometimes feeding her. DP was happy with this as he's historically done it every day and quite enjoyed the break. After a few months of this, the dog became quite attached to DS and wouldn't really pay much attention to DSS. This made DSS unhappy as she's 'his' dog, so DP suggested DS back off slightly and DSS walked her etc. This lasted about 3 weeks, then DSS had enough and stopped doing anything so DS started helping again.
Fast forward to now, the dog is again quite attached to DS and DSS has had a meltdown and said to DP that DS is no longer allowed to walk her etc.
DP is at work today but has suggested we have a chat about the situation later. Do people agree DS shouldn't walk and play with her at all as it's upsetting DSS?