Breastfeeding older baby

Erin

So I'm 21 weeks now and my milk has dried up a while ago however my almost 2 year old will happily dry nurse to sleep. Anyways the other night I brought a sippy cup of cows milk to bed with us and he decided to take matters into his own hands and tried to pour the milk into my boobs 🙈 bless him, I think he will he wanting off me again when it comes back when his brother is born for sure! Anyone else plan on tandem feeding?