To keep it short , my cousin and his wife along with their son moved into our house because of some money issues for a few months.but the problem is my SIL has a breast-feeding baby. She usually wear a tshirts and shorts around the house and whenever the baby is hungry She casually removes her tshirt and bra and breast-feeds her baby half naked. It's actually making me and my husband uncomfortable. I tried gifting her maternity wear and tried talking about how it makes me uncomfortable but she dismissed me. I am thinking about being stern with her . Any helpful advice is appreciated.